Recently Active Questions

Find f(x) if f(x)= \lambda \int _{0} ^ { \pi /2 } \sin x \cos t .f(t) dt + \sin x ...

CH3Cl>CH3F>CH3Br OR CH3F>CH3Cl>CH3Br ...

Are NH2- and BeF2 isostructural? ...

Find value of \int _{0} ^ {n \pi } sin[ \frac {2x}{ \pi } ] ...

*Image* *Image* solve the pbm 1.145 or pls give hints. ...

\int_{0}^{ \pi /4}{\frac{x^2}{(x \sin x + \cos x)^2}}dx ...

1) If sin x + sin y = 3(cos y - cos x), then find the value of sin3x + sin3y ? 2) If sin (x/2) + cos (x/2) = -1/2 , 3pie/2 < x < 2pie, then the value of sin2x? ...

Prove \int_{0}^{\pi}{x.f(\sin x)}dx=\pi \int_{0}^{ \pi /2}{\sin x dx} ...

A0.1M solution of NaCl is found to be isotonic with 1% urea solution.Find (1)van't Hoff's factor and (2)degree of ionization of NaCl. ...

according to bohr n others an e doesnt fall into nucleus as inward coulombic force is balanced by outward centrifugal force.Still a huge amount of attractive do exist between the nucleus and electron....the e is saved from fa ...

Ques1) *Image* An infinite wire having charge denisty λ passes through one edge of the cube having edge length ' l ' .The wire is just inside the cube. Find the (a)Total flux passin through the cube. (b) Flux passing through ...

A point charge q is placed at origin. Calculate the electric flux through the open hemispherical surface : (x-a) 2 + y2 +z 2 = a 2 , x ≥ a. ...

Q=> which of the following compounds will be most easily deformylated and why?? A) α-keto ester B) α-keto acid C) 1,1-dicarboxylic acid D) β-keto ester ...

I dont know if this can be solved.. (I havent so far..) but this question just stuck me when i was seeing another one.. On a solid sphere of radius R, or resistivity σ, there are two points a, b on the equatorial line at a d ...

1. *Image* the co-effnt of friction us=0.6,uk=0.4 btwn 12kg block and 3kg rod.Find the magnitude of the acceleration of the 12kg block immediately after the wire ab is cut (both the angles=30deg.) a.5 b.8 c.2.5 d.N.O.D 2. *Im ...

1. if the ratio of the coordination number of P to Q is Y:Z then the formula of the solid containing atoms of P and Q is...........??? 2. the lattice energy of solid NaCl is 180kcal/mol. the dissolution of solid in water in t ...

A body is moving in a circular motion of constant radius a)net acc of body may be towards centre of circle b)net acc of body may not be towards centre of circle c)KE=constant d)velocity must change ...

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A highly expexted good question for JEE which is made by me with a GREAT MIND. Find the tension in the thread at the last block placed at infinity. Each block is of mass m and the masses of the thread and pulleys are negligib ...

can magnification due to convex mirror be negaive ?????(for both real and virtual objects) ...

Why is m-chlorophenol is more acidic than p-chloro phenol ??? whille this is not the case with NO2 group p-nitrophenol is more acidic than m-clorophenol both Cl and NO2 are electron withdrawing then why this difference?? ...

Two bars f masses m1and m2 connected by a non deformed light spring rest on a horizontal plane. The coefficient of friction between surface and the bodies is μ. What minimum constant force has to be applied in the horizontal ...

its given that " Keq changes only when the temperature changes. There is no effect of change in pressure or concentrations on the value of Keq ." Can someone please tell what is the reason behind this?????? ...

i have a dbt in evaluating this limit,the buk has a diff ans *Image* ...

If l log1/ 3 lzl2-lzl+1/2+lzl l<2 then find all possible values of lzl ...

This one is another of those which are very common olympiad type.. but i think are very important for jee aspirants too... if there are 7 distinct real numbers, show that there will be atleast 2 of them say x,y are such that ...

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Find value of (a+ib)m/n +(a-ib)m/n ...

(1) find value of x in cos7x+sin4x = 1 ...

Prove that the determinant -- sin 2A sin C sin B sin C sin2B sin A sin B sin A sin2C =0 where A,B,C are the angles of a triangle. ...