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Where can i get cbse's last 10 yrs question papers on net......(i need question paper wise....)otherwise 4/5 years pls... If any of u hav some guess / board's sample papers cud u please mail me......sriraghavr@gmail.com ...

34 . A strip of wood of length l is placed on a smooth horizontal surface . An insect starts from one end of the strip , walks with a constant velocity and reaches the other end in time t1 . it then flies off vertically . The ...

When pent-2-ene reacts with HBr. what are the products formed and what is the major product? I know the products formed are 3-bromopentane and 2-bromopentane but which one is major product?? give explanation please ...

let x be any real number, then, x2= x+x+x.....upto x terms differentiating both sides wrt x 2x= 1+1+1.......upto x terms or,2x=x or,2=1. find where is the mistake? forgive me if you think it is a stupid question.it was asked ...

for any differentiable function y=f(x) d2y/dx2 + (dy/dx)3(d2x/dy2) = ??????? kaise approach kare plz batayie ...

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the space between the parallel plates of a cpacitor is filled with a dielectric.each molecule of the dielectric is assumed to have the form of a dumbbell with a length `l`l whose ends carry +q and -q. the number of molecules ...

An oily liqid A is insoluble in water,but on heating with aq. soln. of NaOH for 1 hr. it dissolves.From the reaction mixture ,a liquid B can be distilled,which gives yellow ppt with NaOH/I2 as well as it is resolvable.B on tr ...

*Image* *Image* This is not my doubt.. just 4 others to solve.... see how much time u take to solve this.. i took 2 mins for all three.. [3][4] and u can see in pics above that i had to derive... fringe width Dλ/d also in th ...

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*Image* a particle of mass 'm' moving with velocity 'u' makes an elastic one-dimensional collision with a stationary particle of mass 'm' . they are in contact for a very brief time T. their force of interaction increases fro ...

Q2 total symmetry(plane of symmetry + axis of symmetry) present in benzene molecules is? a) 3 b) 4 c) 6 d) none ...

Show that the locus of the point that divides a chord of slope 2 in the ratio 1:2 is a parabola. Find the vertex of the parabola obtained! ...

CONSIDER A PARTICLE MOVING IN SHM ACCORDING TO EQUATION x=2cos(50Ï€t+tan-10.75) x is in cdentimetre n t is in second motion starts at t=0 (A) WHEN DOES THE PARTICLE COMES AT REST FOR THE FIRST TIME? (B) WHEN DOES THE PARTICLE ...

1`In the face centered cubic arrangement of A and B atoms where A atoms are at the corner of the unit cell and B atoms at the face centres. One of the A atom is missing from one corner in the unit cell. What is the simplest f ...

STATEMENT 1: During the charging of a capacitor(with the help of a battery), the battery is only energising the circuit and not supplying any charge to the circuit. STATEMENT 2: When capacitor is charged with the help of a ba ...

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A spotlight S rotates in a horizontal plane with a constant angular velocity of 0.1 rad/sec. The spot P of lights moves along a horizontal wall at a distance of 3m. The velocity of the spot P when A=45° is___________________ ...

let me be frank to all.........i am pathetic in structure based problems.........i dont know how to solve them....i dont know where to start from............ so plzzzzzz solve this and some more questions which i will post in ...

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Two glass plates having a little of water in between cannot be easily separated because a)atmospheric pressure b)surface tension ...

Find the equation of the chords of the parabola y2=4ax which passes through the point (-6a,0) and which subtends an angle of 45° at the vertex. ...

Find the equation of the circle that passes through the focus of the parabola x2=4y and touches the parabola given at the point (6,9). (My specific doubt is that we can form the two equations from the two given points but whe ...

if in a AP suthe sum of m terms is equal to sum of next n terms is equal to sum of next p terms... then prove that m+n *( 1 / m - 1 / p) *Image* ...

Through the vertex O of the parabola y2=4ax, chords P and Q are drawn at right angles to one another. Show that for all positions of point P, PQ cuts the axis of the parabola at a fixed point. Also find the locus of middle po ...

assertion: A hydrogen filled balloon stops rising after it has attained a certain height in the sky                                    reason: the atmospheric pressure decreases with height ...

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Fro arihant 30 years solutions True /False Q photobromination of 2methyl propane gives mixtuere of 1bromo 2 methyl propane and 2 bromo methyl propane in ratio 9:1 Ans False Explaination:Ratio of 2 products is determined by th ...

do aromatic alcohals n alpha hydroxy ketones give tollen test? ...