Recently Active Questions

The hydrocarbon which can react with sodium in liquid ammonia is CH3CH2CH2C≡CCH2CH2CH3 CH3CH2C≡CH CH3CH=CHCH3 CH3CH2C≡CCH2CH3 ...

limits 0 to 1 2 (tan-1x )2 is this solvable. ...

If F(x) = (1/ x2) , integrate∫0x ( 4 t2 - 2 F '(x) ) dt prove that F'(4) = 32/9.. ...

In an experiment performed with electrons of energy 4eV, the wavelength of the electrons was measured by diffracting them from a crystal. The momentum of the electrons is now doubled. The wavelength of the electrons, after th ...

1. xsinx dx 1+cos2x 2. (x-1)(x-2)(x-3 dx ...

0 to 2pi ecosxcosx(sinx) ans is 2pi . I want the steps. ...

15 identical capacitances , each of 1μF are connected in a hexagonal network ABCDEF such that each vertex is connected with each of the others directly by 1μF .The capacitors and the wires in the network are insulated from ...

Plot this one.. It is interesting. x4=x2y-y3 ...

(x2-1)(x-1)2+(y2-1)2=0 It looks real dangerous. but will be a good practice for a lot of you. ...

1)Acetic acid,when reacts with excess of HI in presence of red phosphorous gives___ 2)wat is the product obtained ,when ter-butyl chloride, on reaction with Na metal _______ 3)Reduction of propanol with HI and red P yields __ ...

A solid copper (density ρ and specific heat c) of radius r at an initial temperature 200 K is suspended inside a chamber whose walls are at almost 0 K.What is the time required for the temperature of sphere to drop to 100K ...

Find the minimum coaltitude which can directly receive a signal from a geostationary satellite Please give the method to solve it ...

*Image* http://rapidshare.com/files/154191992/Ergn.B.3.rar i think many of u know this series. so i thought it would be useful. ...

Consider the points A≡(0,1) and B≡(2,0) .let P be a point on the line 4x+3y+9=0. coordinates of the point 'P' such that |PA-PB| is maximum, are ? ...

Define: emulsions, surfactants and micelles and give two examples of each! I know it is a very boring question.. but this is in jee syllabus and I feel it is important to know! ...

all those whove taken jee-08 pls help me on these issues wat was the colour of the q papers how much space was given for rough work were u given xtra time to fill OMR when did u recieve the paper (exact time) and wen did u gi ...

limits -2 to 2 integrate min { x - [x] , - x - [x] } dx [] denotes greatest integer function ...

integrate: (cos5x + cos4x)/(1 - 2cos3x) ...

Both ICl4- & ClF3 have 2 lone pairs of electrons, but the dipole moment of ICl4- is zero while that of ClF3 is not. Please explain ...

(1) Is CH3COOH amphiprotic? It has a conjugate base CH3COO- as well as a conjugate acid CH3COOH2+, so ideally shouldnt it be amphiprotic? (2) Is the strength of an acid/base and degree of ionisation the same? (3) ...

T1O2 (rutile) shows 6:3 coordination. The solid having rutile like structure among the following is - (a) ZnS (b) KCl (c) SnO2 (d) None of the above ...

draw the graph of Cot-1(x)=y ...

(x3m + x2m + xm) (2x2m + 3xm + 6)1/m dx, x>0 m belongs to N. ...

integrate [ a+c] to [b+c] f(x)dx ...

x = (1-t2)/(1+t+t2) y=t(x+1) for a parameter t. plot the curve. Warning: Those attempting JEE this year should not waste time on this one. ...

daiict k forms kab available honge ...

y=cot-1(x2) ...

It is a ques from one of the tests of the test column Please explain A man skids from the top of a slide to the bottom in 1 sec There is no friction Nothing else was known What is the height of the ramp Ans is This problem ca ...

*Image* a glass prism with respective index 1.5 is immersed in water (refractive index 4/3 ). a light beam incident normally on the face AB is totally reflected to reach the face BC if (a) sin θ >8/9 (b)2/3 < sin θ &l ...

the amont of energy transferred to a stationary body of mass m2 by a collision witha moving body of mass m1 can be increased by interposing another stationarybody of mass m between m1 and m2 such that m1 strikes m and m strik ...