Recently Active Questions

this year iit paper will be set by delhi. when did they last set? last year the paper was easy. will the trend continue? ...

8 prizes are to be distributed by a lottery.The first person takes 5 tickets from a box containing 50 tickets.In how many ways can he extract them so that exactly two tickets are winning?? ...

What will be ur easiest approach on this question... find x.. *Image* easy.. though interesting...!! ...

*Image* follow link given post #3 for image please give solutions... ...

*Image* For second, Options B,D are same. And those contain the answer I think For Third, Someone verify. I think it should be C ...

if x*tan(y) + 1 = (1+x^2)^(1/2) , find dy/dx. ...

Q.Find the minimum radius of a planet of density rho temperature T which can retain oxygen in it's atmosphere.The mass of oxygen is M and the acceleration due to gravity is g m/s^2. Ans-:sqrt[(9RT)/8*G*m*rho*pie] here i get t ...

Shan parks his car among 6 cars already standing in a row, his car not being parked at an end. on return he finds that only 4 of the 7 cars are still there. wHAT IS THE PROBABAILITY THAT BOTH THE CARS PARKED ON BOTH SIDES OF ...

\hspace{-16}\bf{\sum_{n=1}^{\infty}\;\sum_{m=1}^{\infty}\;\frac{1}{m.n.(m+n+1)}}$ ...

\int_{0}^{x}{f(t)d(t)} ----> 5 as |x| ---> 1, then value of 'a' so that the equation 2x + \int_{0}^{x}{f(t)d(t)} = a has at least two roots of opposite signs in (-1,1) is a) 0<a<1 b) 0<a<3 c) -1<a<∞ ...

1. \text{If} \; \sum_{x=\pi-^{10}C_7}^{x= \pi + ^{10}C_r} \; \sin(x^o) = 0 , then value of r is ? 2. Side lengths of the triangle are 3 consecutive integers, and one of the angles in twice that of other, then no. of such tria ...

Q) let a,b,c be distinct complex nos. such that |a|=|b|=|c|>0 . if a+bc , b+ac , c+ab are real numbers then abc = __ Ans. 1 a method or a solution would be appreciated. ...

An acid-base indicator (ka = 3 * 10-5 ) has red colour in acid form and blue colour in basic form . which is/are correct statements; (A) 75% red form will exist at pH = 4.05 (B) indicator will show red colour at pH = 3.53 (C) ...

let f be a one to one continuous function such that f(2) =3and f(5)=7. given (2to5)∫ f(x) dx =17 then value of (3to7)∫ f-1(x) dx is (a) 10 (b) 11 (c)12 (d) 13 ans c 2 if nCk is cmbination of n diff. thing taking k at a ti ...

Q) for a reaction activation energy = 0 and k= 3.2 s-1 at 300 K. the value of k at 310K = ? doubt: does activation energy vary with temperature.so wats the answer ...

Let z and w be two complex numbers such that |z|=|w|=1 and |z+iw|=|z-iw|=2. then z= ...

hey guys could anyone explain how to find equvalent weight in reaction such as, example 1- 4KMnO4 + 5HC2O4.H2C2O4.2H2O + 13H2SO4 → 4MnSO4 + 9KHSO4 +20CO2 + 18H2O the equivalent weight of potassium tetraoxalate crystals are? ...

if a force is applied to top of a cube from one side of lngth L with mass m and frictn co-eff btwn floor and cube surface is φ find the minimum force to turn the cube the other side without allowing cube to slip ...

if Σn=55 , then Σn2= ...

hey guys could anyone explain how to find equvalent weight in reaction such as, example 1- 4KMnO4 + 5HC2O4.H2C2O4.2H2O + 13H2SO4 → 4MnSO4 + 9KHSO4 +20CO2 + 18H2O the equivalent weight of potassium tetraoxalate crystals are? ...

Two solids components A and B dissociate into gaseous products at 20°C as i) A(s) → A'(g) + H2S(g) ii) B(s) → B'(g) + H2S(g) At 20°C pressure over the excess solid A is 50 mm Hg and that over excess solid B is 68 mm Hg. ...

\hspace{-16}\bf{\int_{0}^{1}x^{2012}.(1-x)^{2012}dx} ...

\hspace{-16}\bf{\int_{0}^{1}\frac{x(x+1).e^x}{x+1+e^x}dx} ...

1) Out of C6H5CH2Cl and C6H5CHClC6H5 which is more easily hydrolysed by aqueous KOH. (please explain whether it is SN1 or SN2 for each) 2) p-dichlrobenzene has higher or lower solubility than those of o- and m- isomers ? ...

\hspace{-16}\bf{\int_{-3}^{3}x^8.\left\{x^{11}\right\}dx=}$\\\\\\ Where $\bf{\{x\}=}$ Fractional Part function......... ...

how to solve foll integration please give detail soln ::; 1)) ∫ dx 4sin2x+4sinxcosx+5cos2x if xε(-Π/2,Π/2) 2))x ∫ 2t dt 0 2[t] x>0 [] is g.i.f ...

integer type::::: 1) let f(x)=k/2009 and g(x)= f4(k) (1-f(k))4 + (f(k))4 then sum of digits in the value of *Image* is 2) if S=1/2+1/6(12+22)+1/12(12+22+32)+.............+ 1/3660(12+22+32+................602) then sum of digi ...

An open vessel at 27°C is heated until the 3/5 of the moles of the air in it has been expelled. Assuming that the volume of the vessel remains constant, what is temperature to which the vessel has been heated. a) 27°C b) 30 ...

out of the following compds. all atoms are in one plane are; (A) c=c-c=c (B) c≡c-c=c (C) c=c=o (D) c=c=c (add hydrogens wherever necessary) ans = B,C JEE 2011 Q. how to do such Questions? ...

can any one help me how to determine whether there are ny peroxide linkage or not without knowing the structure of the particular compound ...