Recently Active Questions

I found this one really interesting, try it out: * Start with a full cup of black coffee (no milk) and drink one-third of it. * Now pour into the cup an amount of milk equal to the coffee you have just drunk, and stir well. * ...

two numbers a and b are chosen from the set {1,2.......25}. the probability that a4-b4 is divisible by 5 is? ans: 2/3 ...

1) Which of the following will dissolve in a mixture of NaOH And H2O2 ? a) Ferric Hydroxide b) Chromic Hydroxide c) Aluminium Hydroxide d) Zinc Hydroxide 2) Select the wrong statements - a) Boron atom in the icosahedron has 5 ...

1)A:o-chlorotoulene on treatment with NaNH2/NHH3 gives o and m toulidene R: this reaction is nucleophlic aromatic substitution 2)A:Alkeenes are more reactive than alkynes in electrophilic addition reactions R:Alkyl carbocatio ...

Q1. The weakest base among the following is: (a) amines (b) Amides (c) Ketones (d) Nitriles more will be added after this question gets answerd ...

\boxed{1} Find the value of a for which \int_{0}^{\pi}\{ax(\pi^{2}-x^{2})-\sin x\}^{2}dx is minimized. (easy one) for prac. \boxed{2} Let f(x) be a continuous function satisfying *Image* Find the value of k for which *Image* ...

in an insulated vessel,0.05kg steam at 373K and 0.45kg of ice at 253K are mixed .Find final temp of the given mixture. L(fusion)=336J/g L(vap)=2268J/g S(ice)=2100J/kg S(Water)=4200/kg ans given is 273..i am getting 262K my so ...

if tan(πcosθ)=cot(πsinθ) then form eqn whose roots are cosθ and sinθ ...

BT says a) wheras arihant says b) *Image* ...

Substitute the question marks..... 0,1,2,3,4,5,6,7,8,9 ? ? ? + ? ? ? ---------- ? ? ? ? Using each of the digits given above, and using each digit exactly once fill in the question marks ...

MnO2 + Pb3O4 + HNO3 ---> HMnO4 + Pb(NO3)2 + H2O Balance this equation I an having a doubt due to fractional charge on Pb on LHS ...

2-methyl propanal undergoes which reaction in basic medium ? ...

Why Magnetic force on a current carrying loop in a constant magnetic field is Zero? ...

**deleted** i know some of u may be angry with this act of mine...but i realised my mistake.....sorry again [2] ...

Q17. Find the image of the point (1,6,3) about the "plane"(???) x = (y-1)/2 = (z-2)/3 <- How is this a plane?? My working -: *Image* *Image* ...

which of following os not ah example of pseudo unimoleculer reactions a)ch3cooc2h5+h2o gives (in presence of h+) ch3cooh+c2h5oh b)same reaction in presence of oh- c)c12h22011+h2o giving c6h12o6 in presence of h+ d)ch3cocl+h2o ...

1. \int_{sinx}^{1}{t^{2}f(t)dt}=1-sinx,0\leq x\leq \frac{\pi }{2}, then f\left(\frac{1}{\sqrt{3}} \right)= ans ---------> 3 2. Function f is continuous for all x,( and not everywhere 0), such that \left\{f(x) \right\}^{2} ...

C2H5ONa is a ___________________ in C2H5OH. a) strong acid b) strong base c) weak acid d) weak base The most important question....... WHY ??? ...

A rod of mass 'M' and length 'l' with end A hinged is lying on smooth horizontal table. A particle of mass 'm' with velocity 'u' strikes at right angle to the other end of the rod. Considering perfectly elastic collision find ...

Q:- Water is dripping through a tiny hole at the vertex in the bottom of a conical funnel at a uniform rate of 4 cm3/s.When the slant height of the water is 3 cm,find the rate of the decrease of the slant height of the water, ...

1. Statement-1: In diamond carbon atoms occupy alternate tetrahedral voids in the FCC lattice formed by the carbon atoms Statement-2: In diamond, packing fraction ismore than 74%. 2. Which of the following properties of theme ...

1)the mean and the variance of a binomial distribution are 4 and 2 respectively.then probability of 2 successes is a)37/256 b)219/256 c)128/256 d)28/256 2)n persons sit on a round table. the odd two against two specified pers ...

http://www.openthemagazine.com/article/nation/where-are-they-now is a nice article that tracks what many JEE AIR 1's have gone on to do after BTech at the IITs ...

Compounds used as refrigant are ?? a)NH3 b)CCl4 c)CF4 d)CF2Cl2 e)CH2F2 any concept or just crammmed ans ???? ...

Q:- An inverted cone has a depth of 40cm and a base of radius 5cm.Water is poured into it at a rate of 1.5 cubic centimetres per minute.Find the rate at which the level of water in the cone is rising when the depth is 4cm. ...

black body at temp 2880K.energy of radiation emmited by object with wavelength b/w 499nm and 500nm is U1, b/w 999nm and 1000nm is U2,b/w 1499nm and 1500 nm is U3.Then a)U1=0 b)U3=0 c)U1>U2 d)U2>U1 ...

1. The depression in freezing point caused by a 1M NaCl solution is 0.0123°C. What will be the depression in freezing point caused by 1M glucose solution? 2. When HgI2 is mixed with aqueous solution of KI then freezing point ...

1. The depression in freezing point caused by a 1M NaCl solution is 0.0123°C. What will be the depression in freezing point caused by 1M glucose solution? 2. When HgI2 is mixed with aqueous solution of KI then freezing point ...

Two identical charges of magnitude +Q are fixed along the X-axis. A third charge −Q is placed midway between them at point P. Then small displacements of −Q are made in the directions indicated by the unit vectors. The ∠...

Find all the positive integers ' n ' for which \sqrt{n-1}+\sqrt{n+1} is rational. ans---------------> no positive integers ...