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b64e5482b45ef73549bcae3899768470 | sir please define capacitation and its location sir i didn;t find it in ncert can u ellaborate ? | askiitians.com | 2021.39 | [
{
"text": "capacitationis a functional maturation of the spermatozoon. the changes take place via the sperm cell membrane in which it may be that receptors are made available through the removal of a glycoprotein layer. the area of the acrosomal cap is also so altered thereby that the acrosome reaction becomes possible.",
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e7c1a837ae3019ad8296f857a77555ec | a body is moved from the surface of the earth to a height ‘h’ above the surface of the earth. prove that the change in its gravitational potential energy = mgh. | askiitians.com | 2021.43 | [
{
"text": "gravitational potential energy is the energy of an object possesses because of its position in a gravitational field. the most common use of gravitational potential energy is for an object near the surface of the earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s2. since the zero of gravitational potential energy can be chosen at any point (like the choice of the zero of a coordinate system), the potential energy at a height h above that point is equal to the work which would be required to lift the object to that height with no net change in kinetic energy. since the force required to lift it is equal to its weight, it follows that the gravitational potential energy is equal to its weight times the height to which it is lifted. pe = mgh",
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44b3b799aebad73d5e89deec25689965 | solve xdy- ydx= xy ² dx please solve this one and and allow users to question below 50 characters ….......... | askiitians.com | 2021.21 | [
{
"text": "xdy=ydx + x 2 y 2 /2 – c on integration we get xy=yx + x 2 y 2 /2 therefore x 2 y 2 /2=c so either x 2 y 2 is a constant value which also means xy is constant. i hope this was what you wanted. :)",
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"text": "i do not agree. the correct answer is:- this is solved as:- xdy-ydx=x 2 d(y/x) therefore, x 2 d(y/x)=xy 2 dx or z -2 dz=xdx [where z=y/x] on integration, on putting z=y/x simplifying",
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8cb1483d7cd4a6d3d06aa82f161a731f | find the value of a , b c so that , limx tends to 0 ae^x – bcosx + ce^-x / x.cosx =z | askiitians.com | 2021.21 | [
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"text": "dear student you can see your solution here. askiitians expert",
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3a1ff8e624dcd211bcdbdc3b9d6f6c85 | what is the resistance of capacitor and capacitance of a resistor? | askiitians.com | 2021.31 | [
{
"text": "dear super daman, resistance of capacitor is infinite as there is a gap between plates. capacitance of resistor is infinite as whatever charge we give is taken by it. post all your doubts here. approve it if you like it. best of luck! regards, a s",
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b7986fd5b800c3f8ecae7ddf915e02bb | why isomerization is slow when the ortho form of hydrogen is more stable than the para hydrogen | askiitians.com | 2021.25 | [
{
"text": "ortho hydrogen is not more stable than para hydrogen at all temperatures. at higher temperatures, ortho form is more stable (ortho:para=3:1) at lower temperatures, para form is more stable. moreover, the maximum % of ortho form is 75%. 100% pure ortho form can never be obtained; while 100% pure para form is obtained at about 20k. therefore, the stability varies with temperature.",
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5274268cfd994f10b1471cd048152159 | give reasons for the following (i) sodium carbonate is made by solvay process but the same process is not extended to the manufacture of potassium carbonate. (ii) hydrogen peroxide is a better oxidizing agent than water. (iii) magnesium oxide is used for the lining of steel making furnace. (iv) why is sodium chloride added during electrolysis of fused anhydrous magnesium chloride? (v) hydrogen peroxide acts as an oxidizing as well as a reducing agent. (vi) the crystalline salts of alkaline earth metals contain more water of crystallization than the corresponding alkali metal slats. (vii) beci 2 can be easily hydrolysed. | askiitians.com | 2021.21 | [
{
"text": "hello student, please find the answer to your question (i) potassium carbonate cannot be manufactured by solvay process, since; unlike sodium hydrogen carbonate, potassium hydrogen carbonate is rather too soluble in water to be precipitated like nahco 3 . (ii) h 2 o 2 is a better oxidizing agent than h 2 o because oxidation number of oxygen in h 2 o 2 is – 1 and that in water it is -2. so h 2 o easily reduces to -2 oxidation number. (iii) mgo is used for the lining of steel making furnace because it acts as basic flux and facilitates the removal of acidic impurities of si, p and s from steel through slag formation. (iv) the anhydrous magnesium chloride is fused with nacl to provide conductivity to the electrolyte and to lower the fusion temperature of anhydrous mgci 2 . note : nacl prevents hydrolysis o f mgci 2 (v) the oxidation state of oxygen in h 2 o 2 (i.e. -1) can be changed to 0 or -2 i.e oxygen in h 2 o 2 exists in an intermediate oxidation state with respect to o 2 and o 2- . hence it acts both as an oxidising and reducing agent. (vi) note : smaller the size of cation, higher gill be hydration tendency because hydration energy of cation is inversely proportional to size of cation: the size of alkaline earth metal ions are smaller than the size of alkali metal ions. so in crystalline form the salts of alkaline earth metals have more water molecules than those, of alkali metals. (vii) beci 2 is hydrolysed due to high polarising power and presence of vacant p-orbitals in be-atom. (be = 1s 2 , 2s 2 2 thanks jitender askiitians faculty",
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e791134a5783c601edc711c7e9210aed | 15) acetone reacts with chloroform in presence of caustic soda (naoh) to give (a) acetyl chloride (b) ethyl chloride (c) chloretone (d) chloral gimme the ans with the apt explaination...hurry aieee-2011 approaching hurry...plz...... | askiitians.com | 2021.25 | [
{
"text": "chloroform combines with acetone in the presence of potassium hydroxide to give chloretone, which is used as a sleep producing (hypnotic) drug. the reaction is represented as follows.. plz approve.. priyanka tata",
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"text": "(c) chloretone (ch3)2-c-ccl3(oh) ...is the true answer.... plz approve by clicking yes below if it is helpful....",
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{
"text": "chloretone",
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"text": "chloroetone (sleep including drug) is formed on reacting acetone with chloro form in presence of koh. o of acetone has lone pair so carbon of chloroform will attack at c of c=o, π bond breaks, negative charge on o, h will attack at o - and form oh and ccl 3 will attack c to form chloroetone",
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"text": "dear student, please find the attached answer to your question below. chloroform combines with acetone in the presence of potassium hydroxide to give chloretone, which is used as a sleep producing (hypnotic) drug. the reaction is represented as follows.. thanks and regards, kushagra",
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ca5d79b932520273c5d678380790c15d | sir, i recently gave 2013 jee advanced and my total is 195. can you tell me the rank i would have got in 2013 i can’t find the data on internet please help | askiitians.com | 2021.43 | [
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"text": "ranking of 2013 is closed now...",
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3b8a0a55dd560ab1cc12f99089af7100 | sir how would you rank the computer science stream in ism, nit warangal, bits goa, dtu, nsit?? | askiitians.com | 2021.43 | [
{
"text": "for computer science... nit wrangal » dtu » nsit » ism » bits goa",
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},
{
"text": "cse is very good in all the mentioned colleges.",
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"text": "bits goa and nit warangal are the best but fees in bits goa is too high nearly 3.5 lakhs/year",
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"text": "only for cs, dtu=nsit>bits goa>ism it is according to placement statistics.",
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56455c2b2334d49449873538450f1730 | if b and c are non-collinear vectors and a is a vector such that a.(b+c)=4 and a x (b x c) = (x 2 -2x+6)b + (sin y)c and 0 ans. (1, pi/2) | askiitians.com | 2021.31 | [
{
"text": "the continuation of the question which was missed out is further posted here: and 0 thanks",
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"text": "dear student then qhat i have to solve for. there is no question part. regards arun (askiitians forum expert)",
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{
"text": "“y lies between 0 and pi. then the point (x, y) is“ i’m sorry for the inconvienience. hope this question is sent properly",
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69173d28efdcba6f7bcc6ad95fe3dd59 | which feild are u specialized in and how did u prepare for iit and what rank did u get | askiitians.com | 2021.31 | [
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"text": "hello student we are now expertise in educational field. just remember, study until you are satisfied with your preparation.",
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"text": "dear student please refer the link below for preperation tips https://www.askiitians.com/iit-jee/how-to-prepare-for-iit-jee.html good luck",
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"text": "just be frank to ask questins dont be shy we are here to help you all the best and regards........................",
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c484ce8e01411d968c8c0d78d87653bc | give examples to show that friction is both a friend and a foe. | askiitians.com | 2021.21 | [
{
"text": "dear student examples to show that friction is a friend and a foe: friction is a friend: (i) friction allows us to grip and catch different objects. (ii) it helps us to walk comfortably on the surface. (iii) it helps to minimise the speed or to stop the moving objects. (iv) it helps us to write on paper or blackboard. (v) the things do not move from their place due to the friction between the surfaces. friction is a foe: (i) friction causes wear and tear in objects. (ii) it causes damage to the parts of machines. (iii) the machines or tools require regular maintenance due to which a lot of money is wasted. (iv) it reduces the speed of moving objects, so more force is required. (v) it does not allow the free movement of objects. thanks",
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76f0340e2ea481848aa9b855cce40fae | at certain location in the northern hemisphere, the earth's magnetic field has a magnitude of 42?t and points down ward at 57⺠to vertical. the flux through a horizontal surface of area 2.5 m2 will be ?(given : cos 33⺠= 0.839, cos 57⺠= 0.545)(1) 42 㗠10?6 wb(2) 42 㗠10?6 wb/m2(3) 57 㗠10?6 wb(4) 57 㗠10?6 wb/m2 | askiitians.com | 2021.43 | [
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"text": "when magnetic field passes through a surface, the amount of magnetic flux is calculated by multiplying the component of magnetic field along normal to the surface, with the area of the surface.",
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abb00b8cba8353493856d33045355ee9 | what happens when arene diazonium salts react with resorcinol | askiitians.com | 2021.43 | [
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"text": "resorcinol is very activated for electrophilic aromatic substitutions hence when treated with arene dizonium it gives tri substituted diazo compound..",
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816688f632bca8515cc77264592d9a67 | if i take pcmb in eleventh will i be able to go for mbbs or any other medical courses...?? | askiitians.com | 2021.43 | [
{
"text": "in order to go for mbbs or any other medical courses one should have biology in class 12.if you are taking pcmb it means you will have biology so you will be able to attempt such exams.so all the very best for your future.",
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a6b8e3ecf44d9d014e5af9f68341db33 | i gt 115 marks in mains and 97%in telangana boards.do i have chances of getting into nit.i belong to obc category.in amrita i gt 2825 rank.if at all i get what all nits are possible. | askiitians.com | 2021.25 | [
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"text": "well use askiitian’s rank predictor and compare your pridicted rank with last years closeing ranks of various nit’s you can get rank predictor at the following address : http://www.askiitians.com/iit-jee/main/rank-predictor.html",
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"text": "yes u are elegible i have confirmed my big brother for this he scored 96% and 130 marks in main paper best of luck for advance paper",
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"text": "what was his rank?/",
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b6a794efb1c404a0fd74bfccee6d0100 | why is it necessary to excrete waste products? for class 7 | askiitians.com | 2021.25 | [
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"text": "all cells of our body producewaste products. thesewaste productsare toxic to the body and therefore need to be excreted out. this process of removingwaste productsproduced in the cells of living organisms is called excretion.",
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2c97ccfe53bd269df02d1055511e3556 | there is a solid sphere. divided into x,y and z axes. three conductors are passing through it. radius of sphere is 1m. to find: electric flux leaving the sphere. | askiitians.com | 2021.25 | [
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"text": "dear student i didn't get the question. pleattach an image. i will be happy to help you. regards arun",
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43b0fe08306681150b35a2dad2a73e1c | why the outer membrane of neuron is positively chaarged while inner mebrane is negatively charged? | askiitians.com | 2021.31 | [
{
"text": "dear soumya, the plasma membrane of the nerve fibre separates two solutions of different chemical composition but with aproximately the same total number of ions. in the external medium (tissue fluids), na+(sodium ions)and cl-(chloride ions) predominates, whereas within the nerve fibre k + ions and large negetively charged organic (proteins) ions predominate. this is the reason why outer side of the membrane is positively charged whereas inner side of the neuron is negetively charged. hope the answer of the question.",
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f621131a97cb7fb7cb0d9a09751b60ff | i scored 76 marks in iiti am a sc candidatecan i hope for a seat in iit | askiitians.com | 2021.21 | [
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"text": "askiitians provide the iit jee cut off along with the opening and closing ran given below for iit jee cut off: http://www.askiitians.com/iit-jee-2011-counselling.html click for opening and closing ranks: http://www.askiitians.com/iits-2009-2010-opening-and-closing-rank.aspx thanks and all the best ..",
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14d54181f38d390e80a597b1d334527b | which is the best book for mathematics?? | askiitians.com | 2021.31 | [
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"text": "hello student, thanks for letting us know your requirements. the various important books for mathematics have been mentioned in our website in the below link.kindly you can go through that link http://www.askiitians.com/important-books-iit-jee.aspx thanks and regards shaik aasif askiitians faculty",
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98290b7ed91f0c45311aa5eda47e9a2a | 35. the maximum value of (cos α1 ). (cos α2 ). ….. (cos αn ), under the restrictions 0 ≤ α1,α2,……,αn ≤ π/2 and (cot α1 ). (cot α2 ). ….. (cot αn )=1 is: (a) 1/2n⁄2 (b) 1/2n (c) 1/2n (d) 1 | askiitians.com | 2021.31 | [
{
"text": "and by am\\_gm we have it follows that the max value of the given expression is",
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"text": "for maximum vaule cotx1=cotx2=......….........=π⁄4 so max value of cosx1.cosx2 .....=(1/√2)^n thankyou",
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4b16074a2d5531406c7ec1a091128ac9 | if rank predictords is 3500 -6000 whether i will get betch admission in iit and if 6000-7000 rabj what sub i will get in iit | askiitians.com | 2021.39 | [
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"text": "hi , please check out the opening and closing rank of the iit's: http://www.askiitians.com/iits-2009-2010-opening-and-closing-rank.aspx thaks and all the best!!!",
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c0c0487d3af8356bc71becc9dc113f9c | the angles of a triangle are in a.p series.if the smallest ar medium angles are converted into degrees, their ratio is 3:5 . evaluate the value of angles in radian | askiitians.com | 2021.43 | [
{
"text": "dear student let the angles be a-d,a,a+d sum of all angles of triangle = 180 3a = 180 a = 60 degrees smallest angle = a-d medium angle= a given, (a-d)/a=3/5 1-(d/a) = 3/5 (d/a) = 2/5 d= (2/5) x 60 = 24 degrees hence, the angles in degrees will be 36 , 60 , 84. converting into radians the angles will be (pi/5) , ( pi/3) , ( 7 pi/15) thanks",
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7128cf8fab0c0dc7dffb52540e7e263c | the outer electron configuration of gd (atomic no.: 64) | askiitians.com | 2021.21 | [
{
"text": "gadolinium is a chemical element with symbol gd and atomic number 64. it is a silvery-white, malleable and ductile rare-earth metal. it is found in nature only in combined form the outer electron configuration of gd (atomic no.: 64) is xe 4f7 5d1 6s2",
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"text": "the outer electronic configuration of gd is 4f35d56s2 due to half filled d orbital which makes it exceptionally stable",
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"text": "z=64 symbol:gd block : f block period: 6 period electronic configuration expected: [xe]4f 8 6s 2 observed:[xe]4f7 5d1 6s2 reason: half filled f orbital is more stable than partially filled f orbital and since energy difference is not much between 4f orbital and 5d orbital thus 1 electron from 4f orbital(expected to have 8e) jumps to 5d orbital making it 5d1 thus deviating from the expected configuration and conferring stability through hund’s rule of maximum multiplicity.",
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"text": "vg gadolinium is a chemical element with symbol gd and atomic number 64. it is a silvery-white, malleable and ductile rare-earth metal. it is found in nature only in combined form the outer electron configuration of gd (atomic no.: 64) is xe 4f7 5d1 6s2 i think it is more suitable answer",
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c450fa7b24d402ab05e8a6e47acba231 | the passage of an electric current through a solution causes\_\_\_\_\_\_\_\_\_\_effect. | askiitians.com | 2021.25 | [
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"text": "dear student the passage of an electric current through a solution causes chemical effect. thanks",
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13fadc59e7b75cba4c18d069da688dd5 | sir, tell me about b.tech biotechnology and b.tech industrial biotechnology. tell me which is easy, medium or difficult? sir, i love biology subject very much. i got 95 marks in biology in cbse board exam 2015. please tell me which course is suitable for me, from the above mentioned two courses. sir, tell me the carrer options after completing b.tech biotechnology or b.tech industrial biotechnolgy. please reply me soon. | askiitians.com | 2021.21 | [
{
"text": "biotechnologoy is the coolest job as it has no laborious work,mainly focusing on research. for the industrial biotechnology, as the name itself differentiate you are going to learn the things in industrial scale not under lab scale i.e., less of reasearch work. so choose the one which suits you. all the best.",
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43d168860a7fe29e3a4ed4cd52720605 | q) sin(cot^-1x)+------- a)1/root(1/x 2 ) b)root(1/x 2 ) c)-1/root(1/x 2 ) d)none | askiitians.com | 2021.21 | [
{
"text": "the answer is (d) i guess. sin(cot^-1(x)) =sin(sin^-1(1/root(1+x^2))) =1/root(1+x^2)",
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d91ceb14289eacc1b91f604d3c91a5b4 | electric charges and fields chapter, answer is 2 nd option.... explain it.. | askiitians.com | 2021.31 | [
{
"text": "net flux = flux of curved surface + flux of plane flux through plane = e*pi*r^2*cos 180 = - e*pi*r^2 since the angle is 180 because direction of field lines is opposite to direction of area vector of plane surface. the field lines are in the direction of area vector of curved surface, that is , the hemispherical part or curved part. now flux through curved surface area = 2e*pi*r 2 net flux = 2e*pi*r 2 + (- e*pi*r 2 ) = e*pi*r 2 . hence option (b) is the answer.",
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"text": "flux(curved)+ flux(circular) =0. flux (curved) = -flux (circular). now we know flux = edscos(x). hence, flux(curved)= -(eπr^2cos(180)). we get the answer +πr^2e. hope it helps. i have explained u in the simplest manner. approve if you are satisfied. regards. rohit.",
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f17bc24669e539975cde5247cca43758 | rutherford’s alpha-particle scattering experiment was responsible for the disco event (a) atomic nucleuse (b) electrone (c) protone (d) neutron | askiitians.com | 2021.31 | [
{
"text": "dear student option (a) is correct here. thanks",
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f9aa2718ca45b67b46366ef15498713a | 10. if x = a, y = b is the solution of the equations x + y = 5 and 2x – 3y = 4, then the values of a and b are respectively (a) 6, -1 (b) 2, 3 (c) 1, 4 (d) 19/5, 6/5 | askiitians.com | 2021.43 | [
{
"text": "answer: d",
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a49865f5d19987a9e3b9ab6eb4caaf30 | sir according to your method i solved this question but 2nd last step donot understand.. how 3pid^2/16 is converted to 4/3 can u elaborate please... | askiitians.com | 2021.21 | [
{
"text": "dear student after seeing the solution , it can not be onverted to 4/3 , your ans is correct . hope this will help good lucck cheers",
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8cc87ea5e77914a126732abbb27616af | find the equation of locus of a point which moves so that its abscissa is always 3 units | askiitians.com | 2021.25 | [
{
"text": "since the abscissa is constant and whose value is 3, so that means x=3. now ordinate is variable so basically it can be any real number. so as value of y changes so our point (3,y) will move up or down depending on the value of y. hence it will represent a line parralel to y axis and passing through the point (3,0).",
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70f5eeac8a920f5e314243f9947b5e6a | hi, i took the gate 2010. my result is: air: 642 gate score: 700 do u think that i can get an admission to any of the iits. plz guide me about my other options. | askiitians.com | 2021.25 | [
{
"text": "dear deep 700 is a good score in gate. you are eligible in all the iits . please feel free to post as many doubts on our discussion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. we are all iitians and here to help you in your iit jee preparation. all the best. regards, askiitians experts badiuddin",
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3aa580968d6a6d1b57e2febdd43f5d2b | sir prev year stats show a rank of 2400-2500 (obc) for 132 marks which get atleast geophysics in iit? kindly instruct me if i’m wrong | askiitians.com | 2021.39 | [
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"text": "yes, you are right.. according to previous year data, 132 marks fetched a rank of 2400-2500 obc. thanks bharat bajaj askiitians faculty iit delhi",
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0746507e852ce1e1a23b5eca5befc00c | what happens when steam at temperature 130 degree c is passed through a bucket of water at 63 degree c continiuosly ? | askiitians.com | 2021.25 | [
{
"text": "the steam will mix with water, and the temperature of the mixture will equalize and go on increasing exactly like a homogeneous sample of h2o",
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4053a6c60e358919ab39a7ba2f99d2a6 | friends..how could you make a full adder using two half adders....pls show me how would you do that with boolean expressions.......i.e...taking a full adder logical expression and then simplifying it to get two half adders......pls ..............urgent | askiitians.com | 2021.31 | [
{
"text": "hi murali the logical expression of half adder is a and b are inputs s = a xor b c = a . b s is sum c is carry over both are output the logical expression of full adder is a , b,c are inputs s = a xor b xor c c = ( a xor b ) . c + a . b are the ouput so very clearly we can use half adder s output and another input c to get s = a xor b xor c and we have to use one or gate also for c in full adder so clearly we get xor gate and and gate from half adder which we can use to make full adder",
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3b9d49a2f15c3035ba4a935ede7d98c0 | calculate the total work done when one mole of a gas expands isothermally from an initial volume of 20dm³ to a final volume of 40dm³ at 298 k given r = 8.314 j / k mol | askiitians.com | 2021.31 | [
{
"text": "work done is isothermal process is nrtln(v2/v1) = 1*8.314*298{ln(40/20)} so the work done is 1717.32 jole the work done in volume increase will be +ve",
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c42241bd8c717a7662bd1e94cc1334f6 | for rna interference double stranded rna required. how is dsrna produced whether this mechanism ever takes place in human body | askiitians.com | 2021.31 | [
{
"text": "hi nihala, for rna interference ds-rna is required which is an characteristic feature of viral genomes. iam here with attaching an image hope it gives clear information to you. no its does not takes place in human body. iit is induced to kill the viruses and other harmful gene processess. during genetherapy process this phenomenon are used for correct/cure gene defects.",
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b428dde56c5ad650a0c06062b6e9b532 | light chapter physics class 10 mcq question 11. the nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (f) of the mirror would be (a) real, inverted and diminished in size (b) real, inverted and enlarged in size (c) virtual, upright and diminished in size (d) virtual, upright and enlarged in size | askiitians.com | 2021.31 | [
{
"text": "answer: explanation: (c) convex mirror always forms a virtual, erect diminished image irrespective of the position of object in front of it.",
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] |
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ad2bd26701e1915a554a707ff3e56477 | point charges q1=2 and q2=-1 are at oint x=0 and x=6 respectively.electrial potential will be zero at points | askiitians.com | 2021.25 | [
{
"text": "electric potential will be zero on the straight line in between the two point charges in case of th charges being of opposite sign. equation: 2k/r – 1k/(6-r) = 0 gives r = 4, which means the electric potential is zero at a distance of 4 from q1, i.e., at x = 4",
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0cb94762f3ba36ccbb5d526a1b902bfe | we have a wire of resistance 2ohms and length l. if we divide the wire into 3 pieces. what will the individual resistance of wire be? | askiitians.com | 2021.21 | [
{
"text": "r=rho*l/a......resistnce is directly proportion to the lenght of a conductor.so resistance will be 2/3=.67 of each piece of a wire for same circuit.",
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] |
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ec5faa5cedb29fbb89ddb0b94815579e | what would be the integral of 1/log x | askiitians.com | 2021.43 | [
{
"text": "hi mayur ∫ dx / ln(x) has no known solution in terms of elementary functions. its called the logarithmic integral and the result is expressed as li(x) + c.",
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4020d046674954789caa61fc553d812d | a positively charged ball hangs from a long silk thread. we put a positive charge q at a point and measure f/q, then it can be predicted that field e a.) >f/q b.) <f/q c.) =f/q d.) none of these (reference: arihant's bitsat-2010 pg. no.245 problem no.6) | askiitians.com | 2021.21 | [
{
"text": "electric field is given by f/q. where q is a test charge and f is the force between the test charge q and the charge for which we are calculating e. thanks and regards apoorva arora iit roorkee askiitians faculty",
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860c67dffb8e25d30a65224c5f1132dd | i hav secured 60% marks in cbse 2015 what shuld b my min marks in 2016 mains for a good nit college? | askiitians.com | 2021.21 | [
{
"text": "dear student you need atleast 55-60% in jee mains",
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7ee67742ab54eac883da11a90ac4f3c3 | find and correct the errors in the following mathematical statements. 4(x–5) = 4x–5 | askiitians.com | 2021.39 | [
{
"text": "dear student 4(x- 5)= 4x– 20 ≠4x–5 = rhs the correct statement is 4(x-5) = 4x–20 thanks",
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] |
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c6433fa24a8c8afa7e8b539674b95293 | a superconductor exhibits perfect............ a) ferrimagnetism b) ferromagnetism c) paramagnetism d) dimagnetism. | askiitians.com | 2021.21 | [
{
"text": "pa",
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{
"text": "d) dimagnetism.",
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ebb4d9ce26b0f1c96c6329206982c38b | which of the following metals do not exist independently in water i.e. they ract with each other? a)hso - 4 and cl - b)hso - 4 and oh - c)so 2- 4 and oh - d)no - 3 and cl - | askiitians.com | 2021.31 | [
{
"text": "i guess the d one wont react due to the absence of h^+ ions plz refer with the answer",
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e95522c27a6c1e9f17157015f46f378f | an odd function is symmetric about the vertical line x=a(a>0) and if inf∑[f(1+4r)]^r=8r=0find the numerical value of 8f(1) | askiitians.com | 2021.25 | [
{
"text": "dear student question is not clear please attach an image, we will happy to help you good luck cheers",
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e6c5ba5ec6e58d5a1ac85a4c48434a63 | you are given marbles of diameter 10mm. they are to be placed such that their centres are lying in a square bound by four lines each of length 40mm. what will be the arrangements of the marbles in a plane so that maximum number of marbles can be placed inside the area? sketch the diagram and calculate the number of spheres per unit area. | askiitians.com | 2021.43 | [
{
"text": "hii just place the marbles such that its centre is along the edges of the square. once done then do the internal arrangement . you will get the answer.",
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19d41f7c2160c4f9c17e6f1f98ed80fd | sir i got 85680 jee main air in obc category, sir i want to take electrical engineering can i get admission in nit and plz tell which nits i can get at this rank.... | askiitians.com | 2021.43 | [
{
"text": "getting core branches is difficult for you. you may be requred to wait upto spot round for getting this.",
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2db099070972c31fff0938ceef8ae336 | give the iupac name of ddt a organic compound and how it`s formed | askiitians.com | 2021.25 | [
{
"text": "this is the electrostatic section of the forum please post your question in the organic chemistry section so that maximum students can get benefit from it..",
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},
{
"text": "the iupac name of ddt is 1,1`-(2,2,2-trichloroethane-1,1-diyl)bis(4-chlorobenzene) as given in most of the text books and many authentic website like wikipedia",
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0276cfdf223d58360144f5672cd05982 | earth magnetism | askiitians.com | 2021.39 | [
{
"text": "dear student, it is an uncanny fact that the earth's magnetic axis is close to its rotation axis--that the magnetic poles, where the magnetic force points straight down, are quite close to the geographical ones. please feel free to ask your queries here. we are all iitians and here to help you in your iit jee preparation. all the best. win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian. now you score 5+15 points by uploading your pic and downloading the askiitians toolbar respectively : click here to download the toolbar.. askiitians expert sagar singh b.tech, iit delhi",
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2519ded0239c39f6df627da90a8a37ac | in which pivate colleges in maharashtra can i get a seat for mbbs with a score of upto 275 in neet 2017 with fees upto 6-7 lakhs per year?i have a state domicile and in obc category. i am a dropper also. if at all i dont make it to mbbs whatsoever what ae my chances to make it to govt. bams college in mumbai? | askiitians.com | 2021.39 | [
{
"text": "dear student donot loose hope . there are chances of re neet this year , so, stay calm and proceed on for aiims and jipmer preparation , if u filled the application , and if not , then continue revise for neet , donot stop studying in 275 u will get bhms and bams , and about the private college , i donot think any private college fee will be that low . regards",
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1352268ef0490087adb1ca16d7c6ed3a | hello .can any one plz tell me how to prepare for physics ,astronomy and mathematics olympiads? by the way i’m studying for iit and also plz tell me which books is should use for all maths , physics and astronomy theory?? | askiitians.com | 2021.43 | [
{
"text": "hii i am sending you the list of books. reference books for engineering entrance exam chemistry ncert chemistry text books of class xi and class xii (usually sufficient) organic chemistry by morrison and boyd (only for understanding concepts) arihant organic chemistry objective (optional) organic, physical and inorganic chemistry books by op tandon physical chemistry by rc mukherjeemathematics ncert class xi and class xii books (all students should start with these early) for best concepts you can purchase ‘iit mathematics’ by ml khanna new pattern iitjee mathematics of arihant publications by dr sk goyal books by sl loney (good for coordinate geometry and trigonometry) rd sharma gn bernnam – only use it for calculus as other sections are too advanced for jeephysics ncert physics for class xi and xii (good introduction) concepts of physics, vol.-i & ii, by hc verma physics by d.c. pandey, arihant publications fundamentals of physics, by halliday, resnik and walker (optional)",
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96c9c052754fa7339b9c1f190d218c2e | civil,electrical in nit kurukshetra or automation,instrumnetation in nsit please arrange all four of them in order for me. | askiitians.com | 2021.21 | [
{
"text": "please let me 1 st know ur rank in aieee.............. but besides this i'll prefer nsit because it's located in delhi which will give u an additional benefit over those in nit kurukshetra",
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{
"text": "1 nit kkr electrical 2 nit kkr civil 3 nsit[above branches]",
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3eb02b5d4e5f1afaf1b07e21335c8410 | 103. name the parts of the human female reproductive system where implantation of the fertilised egg occurs. | askiitians.com | 2021.43 | [
{
"text": "answer: explanation: implantation of fertilized egg takes place in the uterus.",
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ad800a8356a06cc711fbca24b3acae40 | a ladder rests against a wall at angle α to the horizontal. its foot is pulled away from the wall through a distance a, so that it sides a distance b down the wall making an angle β with the horizontal. show that a = b tan 1/2 (α + β) | askiitians.com | 2021.43 | [
{
"text": "hello student, please find the answer to your question let the length of the ladder, then in ∆ oqb, cos β = ob/bq → ob = ℓ cos β . . . . . . . . . . . . . . . . . . . . . . . . . . . (1) similarly in ∆ opa, cos α = oa/pa → oa = ℓ cos α . . . . . . . . . . . . . . . . . . . . . . . . . (2) now a = ob – oa = ℓ (cos β – cos α) . . . . . . . . . . . . . . . . . . (3) also from ∆ oap, op = ℓ sin α and in oqb; oq = ℓ sin β ∴ b = op – oq = ℓ (sin α – sin β) . . . . . . . . . . . . . . . . . . . . . . (4) dividing eq. (3) by (4) we get a/b = cos β – cos α/sin α – sin β → a/b = tan (α + β/2) thus , a = b tan (α + β/2) is proved thanks aditi chauhan askiitians faculty",
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4b92292c230048c13f5b7198194ccffc | which is better iit kharagpur economics or iit kanpur metallurgical and material science. | askiitians.com | 2021.43 | [
{
"text": "both of these iit provides a good academic environment. but i think if we consider another factors like placement as a factor of comparison then surely you should opt iit kharagpur economics. hope you will consider my advice with regards ti mr. iitian sahil",
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{
"text": "hello, any one better but what do you really interest?that one you choose.it is better for your life.all the best",
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{
"text": "both the institutions are highly reputed and both the branches areequally good as far as future prospects are concerned. so.it is up to you to decide which branch to choose and what interests you the most. i may suggest you to choose a few selected reputed institutions too and then compare and contrast the features and finally decide vwhere you wish to be, these institutions are – sarvottam institute of technology and management, greater noida,.................bhu, varanasi,..............anna university, chennai,................lovely professional university, phagwara",
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d82d3d72bceab54408f033814c704e27 | how are multiple iiriages formed ? name a device based on this principle ? | askiitians.com | 2021.25 | [
{
"text": "when three rectangular strips of plane mirror are kept edge to edge at an angle of 60° to each other, multiple images are formed. kaleidoscope is based on this principle.",
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498d274305599784c01e8d2f506febaa | 78. explain why a ray of light passing through the centre of curvature of a concave mirror, gets reflected along the same path. | askiitians.com | 2021.31 | [
{
"text": "answer: explanation: the ray passing through the centre of curvature incident to the mirror along its normal, so ∠i = ∠r = 0. therefore, the ray retraces its path.",
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da3fd22d935f73934dd3f789a65fd04c | which rank predictor should we believe career point or resonance or ask iitians rank predictor?????? pls godfrey sir answer | askiitians.com | 2021.21 | [
{
"text": "dear naga, all these rank predictors just give an idea no one can exactly tell ur rank. best of luck..!!!! plz approve the answer....!! we are all iitians and here to help you in your iit jee preparation. now you can win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian. now you score 5+15 points by uploading your pic and downloading the askiitians toolbar : click here to download the toolbar.. aman bansal",
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2720f5824c7da04c2348f96b28f70b0b | my all india aieee rank in b.arch is 20345 and my state rank is 4oo and i am from haryana . can i get nit ? | askiitians.com | 2021.21 | [
{
"text": "dear koyal, with your rank .. its is quite difficult to get b.arch.. check out the link given below , ity will be helpful. click for barch openining and closing : http://www.askiitians.com/aieee-counselling/architecture-counselling.aspx all the best for your future! please feel free to post as many doubts on our discussion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. we are all iitians and here to help you in your iit jee preparation. all the best. now you can win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian. regards vijay luxmi",
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d273109ceb090ca28bb827ba93531a6b | why anti aromatic compounds are very unstalbe, even conjugation of double bond is present there | askiitians.com | 2021.39 | [
{
"text": "antiaromaticity is a characteristic of a cyclic molecule with a p electron system that has higher energy due to the presence of 4n electrons in it. unlike aromatic compounds, which follow hückel's rule ([4 n +2] p electrons) and are highly stable, antiaromatic compounds are highly unstable and highly reactive. to avoid the instability of antiaromaticity, molecules may change shape, becoming non-planar and therefore breaking some of the p interactions.in contrast to the diamagnetic ring current present in aromatic compounds , antiaromatic compounds have a paramagnetic ring current. thank you ruchi askiitians faculty",
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d255ed35adbda39e7f1a30aa809291ec | i am getting 157/360 in aieee 2011. will i be able to get nit kurukshetra or allhabad. what are the chance for dce. i belong to delhi | askiitians.com | 2021.43 | [
{
"text": "dear tushar, u can get nit srinagar or any other lower nit. not dce also!!!!!! u can easily try for any iiit!!!!! hope for d best!!!!!! good luck!!!!!!!! plz. approve by clicking 'yes' given below!!!!!!! plz. plz. plz.!!!!!!!!!",
"name": "",
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{
"text": "dude according to askiitians and resonance your rank would be approx in between 17k to 20k so with that you can get nit kurukshetra but in lower branches like chemical or can take even a gud branch in nit silchar in 3rd or 4rt round of councelling nit silchar is second or third best in terms of placement among all nits ,click on yes if you agree",
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5e69c8f8ca9e2040bd560078d10d589b | magnetic moment of a bar magnet is m. the work done to turn the magnet by 90 degrees of magnet in direction of magnetic field b will be | askiitians.com | 2021.39 | [
{
"text": "work done is given by w = mb(cos0 – cos90) = mb. hope it clears.",
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e8c626e325e0daef867cf329757f7543 | the dipole moment of hydrogen chloride is 1.03 d. its percent ionic character is about 17%. its bond distance in pm is about | askiitians.com | 2021.25 | [
{
"text": "h+ and cl- bear a unit charge of 4.8*10^-10 theoritical value of u=4.8*10^-10 *d wher d is the bond distance percentage of ionic character=exp/theoritical*100=17 bond distance=1.27a thanks and regards sunil kr askiitian faculty",
"name": "",
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{
"text": "here, we are given the percent ionic character\n= 17% =0.17, so if r is the bond distance, the dipole moment of hcl is (0.17e)r = (0.17 x\n1.6 x 10 –19 c) r = (1.03 x 3.33 x 10 –30 c m) r = 1.03 x 3.3356 x 10 –30 cm / 0.17 x 1.6 x 10 –19 c thus, we have bond distance= 1.27 x 10 –10 m = 127 pm thanks\n& regards, vasantha sivaraj, askiitians faculty",
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{
"text": "correct answer and good explanation\nthank you mam",
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{
"text": "given :- observed dipole moment = 1.03d % ionic character = 17% now we know that, mu = e * d = 1.6 * 10 -19 *\nd/3.335 * 10 -30 mu = 0.48 * 1011 * d(m) % ionic character = observed dipole moment/ calculated dipole moment *100 17 = 1.03 * 100/ 0.48 *10 11 * d d\n= 1.03 * 100/0.48 * 10 11 * 17 d\n= 0.127 * 10 -9 or, d = 127 pm thanks & regards aarti gupta askiitians faculty",
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502817483b6f05cb7f5e532989e25e20 | half life of a certain radioactive substance is 69.3 days. its disintegration constant is: | askiitians.com | 2021.31 | [
{
"text": "dear student, half life for 1 st order reaction = 0.693/k so 69.3=0.693/k => k= 100. thanks and regards adarsh",
"name": "",
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},
{
"text": "half life for first order reaction= 0.693 / k 69.3 = 0.693/k k= 0.01day-1 here k is decay constant thanks and regards anurag misra",
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}
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f6aaee77ff0119310d17050793a74eda | the phase of a particle at t is 70 degree and other particle at 790 degree what is the wavelength if the distance between two particle is 1 metre | askiitians.com | 2021.43 | [
{
"text": "wavelength is the length traversed by the wave when it moves by an angle of 2*π that is 360 degrees . here the two particles are (790-70) =720 degrees apart that is equal to 4*π or 2*360. so the wavelength is half of the length i.e. 0.5metre .",
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fb3346234876327ec7ed58d2d459352b | 66. a body is moved along a straight line by a machine delivering a constant power. the distance moved by the body in time t is proportional to ? | askiitians.com | 2021.21 | [
{
"text": "distance travelled,s = ut +1/2a(t^2) where u=initial velocity, a =acceleration, t=time assuming u= 0 s=1/2a(t^2) f=ma f = power/velocity p/v =ma , but p and m are constant so; 1/v is proportional to a v =s/t 1/v =t/s t/s proportional to a substitute t/s for a in s=1/2a(t^2) s is proportional to (t/s) *(t^2) s is proportional to (t^3)/s so s^2 is proportional to t^3 and s is proportional to t^3/2",
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] |
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8a3860f0938ad854c717b29bb16ccf2f | wha is lewis kossel structure? | askiitians.com | 2021.21 | [
{
"text": "this theory would be later called lewis theory and it is based on the following principles: valence electrons , or the electrons in the outermost electron shell , have an essential role in chemical bonding. ionic bonds are formed between atoms when electrons are transferred from one atom to another",
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] |
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0376abfc2431de45f94b544bb692419a | guys please reply asap!!!!!!!!!!! what is the answer? | askiitians.com | 2021.21 | [
{
"text": "when 1 is connected, capacitor c1 gets charged to potential 60v attaining a charge equal to . when 1 is diconnected and 2 is connected, the capacitor c1 starts to get discharged into an effective capacitance of (formed by series combination of c2 and c3). from kirchoff’s voltage law, the voltage across the two capacitors will be same. thus the initial charge attained by c1 has actually been divided into capacitances and . thus hence",
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86167a3ee49c8353f119b75d4aea76d4 | what is balanced diet ? what is photosynthesis? how use photosynthesis? what is fabric and fiber and yarn | askiitians.com | 2021.31 | [
{
"text": "balanced diet is a diet that contains an adequate quantity of the nutrients that we require in a day. a balanced diet includes six main nutrients, i.e. fats, protein, carbohydrates, fibre, vitamins, and minerals. please ask only one question in one thread.",
"name": "",
"is_accepted": false
},
{
"text": "photosynthesis- the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product",
"name": "",
"is_accepted": false
},
{
"text": "dear student fabrics are used to make corporate uniforms, workwear uniforms, jackets and all other textiles. the yarn on the other hand is a processed fibre. yarns are threads made of fibre from known raw materials like cotton balls, silk, or wool. hope this helps good luck",
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526e73bc1463d7ecbc03e33a37c850d1 | many of the elements which are joint by only van der waals force are called thermodynamically stable.why. | askiitians.com | 2021.43 | [
{
"text": "thermodynamic equilibrium is an axiomatic concept of classical thermodynamics. it is an internal state of a single thermodynamic system, or a relation between several thermodynamic systems connected by permeable walls. in thermodynamic equilibrium there are no net macroscopic flows of matter or of energy, either within a system or between systems. in a system in its own state of internal thermodynamic equilibrium, no macroscopic change occurs. systems in mutual thermodynamic equilibrium are simultaneously mutually in thermal, mechanical, chemical, and radiative equilibria. systems can be in one kind of mutual equilibrium, though not in others. in thermodynamic equilibrium, all kinds of equilibrium hold at once and indefinitely, until disturbed by a thermodynamic operation. in a macroscopic equilibrium, almost or perfectly, exactly balanced microscopic exchanges occur; this is part of the notion of macroscopic equilibrium. an isolated thermodynamic system in its own state of internal thermodynamic equilibrium has a uniform temperature. if its surroundings impose some unchanging long range force field on it, it may consist of one phase or may exhibit several spatially unchanging internal phases. if its surroundings impose no long range force field on it, then either it is spatially homogeneous, with all intensive properties being uniform; or it has several internal phases, which may exhibit indefinitely persistent continuous spontaneous microscopic or mesoscopic fluctuations. in non-equilibrium systems, by contrast, there are net flows of matter or energy. if such changes can be triggered to occur in a system in which they are not already occurring, it is said to be in a metastable equilibrium. it is an axiom of thermodynamics that when a body of material starts from a non-equilibrium state of non-homogeneity or chemical non-equilibrium, and, by a thermodynamic operation, is then isolated, it spontaneously evolves towards its own internal state of thermodynamic equilibrium. this axiom is presupposed by the second law of thermodynamics, which tells what happens when a system, having reached thermodynamic equilibrium, with a well defined entropy, is subject to a thermodynamic operation.",
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df021f09433531aa8bf7f6203eb9fcc3 | ch3chch3chch2ch2ch3 | askiitians.com | 2021.25 | [
{
"text": "cn h2n+1 where n = 7, right?? i had a hard time counting those h atoms!! please space them!!!!!! idk!! any functional group????? an extra h ?",
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},
{
"text": "heptane",
"name": "",
"is_accepted": false
},
{
"text": "i don't think it is an alkane because it is c7 h15, not c7 h16",
"name": "",
"is_accepted": false
}
] |
|
d22302c4e31c0f29c07f069e31447544 | 2. find k so that x + 2x + k is a factor of 2x 4 + x 3 – 14x 2 +5x +6. also find all the zeroes of the two polynomials. | askiitians.com | 2021.31 | [
{
"text": "dear student given factor x 2 + 2x + k = 0 given polynomial 2x 4 + x 3 -14x 2 + 5x + 6 x 2 + 2x + k ) 2x 4 + x 3 -14x 2 + 5x + 6 ( 2x 2 - 3x +(- 8 - 2k) 2x 4 + 4x 3 +2kx 2 ( substract) ------------------------------ - 3x 3 +(-14 - 2k)x 2 + 5x - 3x 3 - 6x 2 - 3kx ( substract) ------------------------------ (- 8 - 2k) x 2 +( 5 + 3k)x + 6 (- 8 - 2k) x 2 +(-16 - 4k)x + (- 8k - 2k 2 ) ( substract) ----------------------------------------------------------------- ( 21 + 7k)x + (6 + 8k + 2k 2 ) ∴ remainder ( 21 + 7k)x + (6 + 8k + 2k 2 ) = 0 21 + 7k = 0 ⇒ k = -3. the factors are x 2 + 2x - 3 = 0 and 2x 2 - 3x - 2 = 0 x 2 + 3x - x - 3 = 0 and 2x 2 - 4x + x - 2 = 0 x( x + 3 )-1( x + 3) = 0 and 2x (x - 2) + 1(x - 2) = 0 (x - 1)( x + 3) = 0 and (2x + 1)(x - 2) = 0 x = 1 ,3 ,-1 / 2 and 2. the zeros are 1 ,3 ,-1 / 2 and 2. regards arun (askiitians forum expert)",
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] |
|
79b0cc065a00e380803e67f520d31595 | dis is december going on... i m done with all the concepts..i mean reading ncerts of 11th and 12th ! i have aakash iit jee package ... can i do it in approx 4 months in hand..in order to get a respectful rank in iit jee ? plsss repllly asap! | askiitians.com | 2021.25 | [
{
"text": "hi shaurya, if your concepts are good, then problem solving and practice can be covered in 4 months. it is quite a sufficient time. make sure you revise before iit jee. revision is one of the key factors for success. wish you all the best for iit jee. regards, ashwin (iit madras).",
"name": "",
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] |
|
8439af192eb81a5d8e9d9d7b34f0c8d3 | sir is it enough for physical chemistry that i study all the concepts and practice only those problems that have been asked in any competitive examination???? | askiitians.com | 2021.25 | [
{
"text": "dear student, yeah it is more than enough ... please feel free to ask your queries here. we are all iitians and here to help you in your iit jee preparation. all the best. win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian. now you score 5+15 points by uploading your pic and downloading the askiitians toolbar respectively : click here to download the toolbar.. askiitians expert sagar singh b.tech, iit delhi",
"name": "",
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] |
|
eb7ea25f296ba9ab5d7a38ea91d0197c | sir, what is the difference between int msc tech [ism dhanbad] and int ms [iit kharagpur] in applied geology | askiitians.com | 2021.43 | [
{
"text": "if you are getting same course in ism and iitk then prefer iit k.",
"name": "",
"is_accepted": false
}
] |
|
01ee5dfafd19246ceeb7d92fac298b81 | what are the differences between inner and outer planets? | askiitians.com | 2021.39 | [
{
"text": "dear student the planet which is close to sun is called inner planet, these planet are ,made up of rocks, mercury, venus, earth, and mars are the planets closest to the sun. they are called the inner planets. the outer planets are jupiter, saturn, uranus, and neptune.",
"name": "",
"is_accepted": false
},
{
"text": "mercury, venus, earth, and mars are the planets closest to the sun. they are called the inner planets. the inner planets are made up mostly of rock. the outer planets are jupiter, saturn, uranus, and neptune.",
"name": "",
"is_accepted": false
}
] |
|
5595fb2a62b75250f5a5a363b3d14549 | 2. find the values of k for each of the following quadratic equations, so that they have two equal roots. (i) 2x2 + kx + 3 = 0 (ii) kx (x – 2) + 6 = 0 | askiitians.com | 2021.43 | [
{
"text": "(i) 2x2 + kx + 3 = 0 comparing the given equation with ax2 + bx + c = 0, we get, a = 2, b = k and c = 3 as we know, discriminant = b2 – 4ac = (k)2 – 4(2) (3) = k2 – 24 for equal roots, we know, discriminant = 0 k2 – 24 = 0 k2 = 24 k = ±√24 = ±2√6 (ii) kx(x – 2) + 6 = 0 or kx2 – 2kx + 6 = 0 comparing the given equation with ax2 + bx + c = 0, we get a = k, b = – 2k and c = 6 we know, discriminant = b2 – 4ac = ( – 2k)2 – 4 (k) (6) = 4k2 – 24k for equal roots, we know, b2 – 4ac = 0 4k2 – 24k = 0 4k (k – 6) = 0 either 4k = 0 or k = 6 = 0 k = 0 or k = 6 however, if k = 0, then the equation will not have the terms ‘x2‘ and ‘x‘. therefore, if this equation has two equal roots, k should be 6 only.",
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|
dfa9eab8bc3ca017888347d8dc85557b | define mag dipoloe moment of a current loop? | askiitians.com | 2021.43 | [
{
"text": "the total amount of torque experienced by a current loop when placed in a uniform magnetic field ,of unit intensity . is called magnetic moment of the currentloop. it is equal to n i a",
"name": "",
"is_accepted": false
},
{
"text": "thank you",
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|
ac00fb8f25f896d269a236fcd791164a | what is one curie of disintegration.....in reference to nuclei class12 | askiitians.com | 2021.25 | [
{
"text": "the amount of radioactivity in a quantity of material can be determined by noting how many curies of the material are present. 1 curie = 3.7 x 1010 disintegrations per second",
"name": "",
"is_accepted": false
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] |
|
0c9a6b33ab0cbd1fa0c91f39ebd4d075 | is primary valency the charge on the central metal or on the whole co-ordination sphere??? | askiitians.com | 2021.25 | [
{
"text": "dear student primary valency is the charge on central metal alone and therefore corresponds to oxidation number of metal.",
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|
d3c49fd2abe02d625b16ce0826751d01 | phenol,when it first reacts with conc.sulphuric acid and then with conc.nitric acid gives a)o-nitro phenol b)p-itrophenol c)nitrobenzene d)2,4,6-trinitrobenzene please explain in detail. | askiitians.com | 2021.31 | [
{
"text": "dear vikas this is the method of formation of picric acid( 2,4,6-trinitrobenzene) first when it reacts with cons sulphuric acid mixure of o-phinol sulphonic acid and p-phenol sulphonic acid forms and when this mix reacts with cons nitric acid then picric acid form. please feel free to post as many doubts on our discussion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. we are all iitians and here to help you in your iit jee & aieee preparation. all the best. regards, askiitians experts badiuddin",
"name": "",
"is_accepted": false
},
{
"text": "respected askiitians expert, badiuddin isn’t picric acid 2,4,6-trinitrophenol and therefore the options are wrong?",
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}
] |
|
6eb1aa9fb2cfbc0307099042f485002a | explain the factors essential for photosynthesis. about chlorophyll,light,co2 and water . | askiitians.com | 2021.39 | [
{
"text": "the factors essential for photosynthesis are - 1] chlorophyll 2]light energy 3] water 4] carbon dioxide 2 reactions happen dark and light reaction during photosynthesis.",
"name": "",
"is_accepted": false
}
] |
|
64260cf947fb5b6bd026e9ce179fdcbb | sir i m getting 61 marks in iit 2010. will i get selected in eml? and also i m in general category. plz help me out as soon as u can.. | askiitians.com | 2021.21 | [
{
"text": "hey dear i thope the doubt has been resolved till now if your brother or sister or any other knwon relative is preparing for iit you can tell him/her about askiitians services where he or she can ask doubts , check study material , join test seriesand also access many other services thanks",
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|
0c265c80a1558c50541072bb5e05d097 | to cross the river in shortest distance, a swimmer should swim making angle theta with the upstream. what is the ratio of the time taken to swim across in the shortest time to that in swimming across over shortest distance. [assume speed of swimmer in still water is greater than the speed of river flow] | askiitians.com | 2021.25 | [
{
"text": "",
"name": "",
"is_accepted": false
},
{
"text": "t(shortest)=t1=d/v(sr) t(shortest distance)=t2=d/v(sr)sin(theta) =t1/t2= sin (theta) where d is width of river",
"name": "",
"is_accepted": false
},
{
"text": "answer is sin (theta) as t shortest=t¹=d/v(sr) t(shortest)=t²=d/v(sr) sin (theta) =t¹/t²=sin (theta) where d is width of river",
"name": "",
"is_accepted": false
},
{
"text": "dear student, please find the solution to your problem. let the velocity of river be v r and velocity of swimmer be v sr for the shortest time case- time taken to cross river, t 1 = d/v sr for shortest distance case- time taken to cross river, t 2 = d/v sr cos θ where θ is the angle made by swimmer w.r.t the direction normal to the direction of flow of river. where cosθ = (v sr 2 – v r 2 ) 1/2 /v sr hence, t 1 /t 2 = cosθ = √(1 – (v r /v sr ) 2 ) thanks and regards, kushagra",
"name": "",
"is_accepted": false
}
] |
|
d0aa659add358049bfb059bdea96b6d1 | in the following figure oe bisects angle aod. if angle boc is 70 degree . find the value of angle eod | askiitians.com | 2021.31 | [
{
"text": "dear student question is not clear please upload an image. we will happy to help you. good luck cheers",
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"is_accepted": false
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] |
|
faaee2c957683c0be5df0b3be186438d | give reasons for the following : 1)the skiers use flat and broad skis 2)deep sea divers wear special suits. | askiitians.com | 2021.21 | [
{
"text": "1)the skiers use flat and broad skis to ski on the snow. the larger surface of skis reduces pressure on snow and helps them to slide instead of sinking. 2) deep sea divers wear special suits, because the pressure of water increases with depth. the increased pressure may hurt the body of divers.",
"name": "",
"is_accepted": false
}
] |
|
d2934eabb048a9ba58df50d2c9f4ba2d | int(from (0) to (pi) ln[(b-cosx) / (a-cosx)] dx | askiitians.com | 2021.25 | [
{
"text": "ans: …..............(1) .............(2) (1) + (2) integration by parts simply using the partial fraction rule here, we have thanks & regards jitender singh iit delhi askiitians faculty",
"name": "",
"is_accepted": false
}
] |
|
f407d931caefd1cf4726de96ca8736db | give an example of a non-living thing, which shows any two characteristics of living things. | askiitians.com | 2021.39 | [
{
"text": "car is an example of a non-living thing that shows two characteristics of living things. a car can move from one place to another. also, it requires energy just like living things.",
"name": "",
"is_accepted": false
},
{
"text": "crystals, such as ice crystals forming on a window, grow bigger if the conditions are right.",
"name": "",
"is_accepted": false
},
{
"text": "robot is an eg of a non-living thing with 2 characteristics of living things. it can walk and talk like living beings.",
"name": "",
"is_accepted": false
},
{
"text": "cloud is such a example because cloud can grow and move so car is also an example of this question because it can move and take energy",
"name": "",
"is_accepted": false
},
{
"text": "cloud is such a example because cloud can grow and move so car is also an example of this question because it can move and become bigger",
"name": "",
"is_accepted": false
},
{
"text": "robot and the characterisitics shown it breathes andmoves.",
"name": "",
"is_accepted": false
},
{
"text": "a glow worm and any type of non living luminous object like sun , stars , a working torch. the answer that adarsh gave is excellent example and i would like to go with it too.",
"name": "",
"is_accepted": false
},
{
"text": "a mobile phone is such an example because it requires energy to work and also stores information. humans also also store information in their brains and also need energy to work.",
"name": "",
"is_accepted": false
},
{
"text": "cloud is also a example because it can move from one place to another and it can increase or decrease in size.",
"name": "",
"is_accepted": false
},
{
"text": "robot is an example of a non living thing which does actions of a living being . it does not require oxygen or food to live , but rather its foods are its battery and machines . if they will work properly , it will work . it can do many things .",
"name": "",
"is_accepted": false
},
{
"text": "bus is an example of a non - living thing that shows two characteristics of living things . like the living things , it can move from one place to another and it also requires energy to do work.",
"name": "",
"is_accepted": false
}
] |
|
ec389f281a02c01a0a9069869bea45cc | i want to take cs..i am getting all nits with my rank(2177-air)...i may also get cs at dce(atleast ee is sure in dce)..what should i prefer??should i stick with dce? | askiitians.com | 2021.39 | [
{
"text": "you may not get in nit warangal, trichy. but u can get in surathkal, calicut, kurukshetra etc .. nits like waran, trichy, surthakal only r compared better to dce . you can look for dce too as it has gud plcmnt record . ( dce comes after warangal, trciy, srathkal) all the best -- regards ramesh now you can win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian",
"name": "",
"is_accepted": false
}
] |
|
6db0adfac87a3449604866ee2c020bc9 | how can we find direction in vector addition | askiitians.com | 2021.39 | [
{
"text": "we can easily add vecto and using tan",
"name": "",
"is_accepted": false
}
] |
|
b78943bfb2cd680f04195e85b462dd72 | decomposition of hydrogen is retarded by which compound(formula)? | askiitians.com | 2021.31 | [
{
"text": "dear student, the answer is vanadium compounds. we are all iitians and here to help you in your iit jee preparation. all the best. if you like this answer please approve it.... win exciting gifts by answering the questions on discussion forum sagar singh b.tech iit delhi",
"name": "",
"is_accepted": false
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] |
|
ea90b47c162a759970354892d6c02c11 | m = i + that make 2 100 /2 100 - m = i + ∑m = ? total of integer plus of m ? | askiitians.com | 2021.43 | [
{
"text": "dear student please write question with clear demarcation of numerator and denominator to avoid ambiguity of perception regards",
"name": "",
"is_accepted": false
}
] |
|
8e4edee993c882a6f31b1eb86d507ba5 | the hybridization of the central carbon in ch3c≡n and the bond angle ccn are a. sp2, 180°. b. sp, 180°. c. sp2, 120°. d. sp3, 109°. | askiitians.com | 2021.21 | [
{
"text": "ans. (b)\ncentral carbon = sp(3-n) , where n = no of pi-bond\nso, sp and angle = 180 degree",
"name": "",
"is_accepted": false
}
] |
|
ea62980fbde7eeb8d6eba4027346bceb | sir, my rank in aieee is 36416.since i didn't tuk coaching in 12th.i got a score of 119 in iitjee.should i drop and prepare for iitjee? | askiitians.com | 2021.21 | [
{
"text": "hello vatsalya you should prepare for iitjee as even without taking a formal coaching, you have managed to get a substantial rank. this shows that you have the talent to crack iitjee. you just need proper guidance and the right direction and you will be headed towards the glorified path of iit. start from basics. iit jee prepration minimum takes a minimum one year. the complexity of the iit-jee arises from the fact that the questions are always unique in their context, and solving them often requires a combination of concepts from across different chapters. and to understand these concepts you must give time .every year many student crack iit jee just by prepearring one year. so works on basics nd do lots of practise. feel free to post any questions or queries that you have in mind related to iit-jee or aieee and you will get your queries solved by iitians itself! if you liked the reply, please approve it! hope that helped! all the best. ankit mehra",
"name": "",
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|
1a53fd1703f4a7c6af1e8cdfa0118508 | 2 blocks of masses 10 kg and 20 kg moving at speeds of 10m/sec and 20m/sec resp. in oppsite directions collide.if the collision is completly inelastic,find the thermal energy developed in the process. | askiitians.com | 2021.43 | [
{
"text": "dear allina, ans;- the final velocity of the combination is v (let) towards the initial direction of the 20 kg body hence the eq of the conservation of momentum is (20*20)-(10*10)= 30v hence v=10m/s from the conservation of the total energy we get, 1/2(20*20²+10*10²)=h+1/2(30*10²) solving we get h=2000 j =2 kj please feel free to post as many doubts on our discussion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. we are all iitians and here to help you in your iit jee preparation. all the best alina!!! regards, askiitians experts soumyajit iit\\_kharagpur",
"name": "",
"is_accepted": false
}
] |
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