List of top Questions asked in KCET, WBJEE

Which of the following is the hydrophobic synthetic acrylate polymer that has glass-transition temperature of about 10°C?

In a reaction carried out at 400 K, 0.01% of the total collisions are effective. What is the energy of activation of the reaction?

Consider the following metallurgical processes:(A) Heating impure metal with CO and distilling the resulting volatile carbonyl compound, which is finally decomposed at 150^oC - 200^oC to get pure metal.(B) Heating the sulphide ore in air until a fraction of it is converted to its oxide and then further heating in the absence of air to allow the oxide to react with unchanged metal sulphide and reduce it to the metallic state.(C) Electrolysis of the molten electrolyte containing approximately equal amounts of the metal chloride and NaCl to obtain the metal.The processes used for obtaining Mg, Ni and Cu, respectively, are

The percentage by volume of C3H8 in a mixture of C3H8, CH4 and CO is 36.5. Calculate the volume of CO2 produced when 100 ml of the mixture is burnt in excess of O2.

If the sums of n terms of two arithmetic series are in the ratio 2n + 3 : 6n + 5, then the ratio between their 13^th terms is

The equations of the lines through the point (3, 2) which make an angle of 45^o with the line x - 2y = 3 are

The value of ${\cot }^{-1}9+\cos e{c}^{-1}\frac{\sqrt{41}}{4}$

The angle between the straight lines $x-y\sqrt{3}=5$ and $\sqrt{3}x+y=7$ is

${\int }_0^{\pi /2}\frac{\sqrt{\cot x}}{\sqrt{\cot x}+\sqrt{\tan x}}$dx is equal to

If [x] denotes the greatest integer x, then $\left[\frac{2}{3}\right]+[\frac{2}{3}+\frac{1}{99}]+[\frac{2}{3}+\frac{2}{99}]+\dots ..+[\frac{2}{3}+\frac{98}{99}]$is equal to