IIT JEE-AIEEE 2012, Entrance Notifications, Study Tips, Engineering Preparation, Practice Test Papers, Experts Advice

(a) The frictional force acting on the block is f = mg.
(b) The normal reaction force acting on the block is N = F.
(c) No net torque acts on the block.
(d) N does not produce any torque.

Chemistry

For a first-order reaction
(a) the degree of dissociation is equal to

.
(b) a plot of reciprocal concentration of the reactant versus time gives a straight line.
(c) the time taken for the completion of 75% reaction is thrice that of

of the reaction.
(d) the pre-exponential factor in the Arrhenius equation has the dimension of time

Mathematics

If n is even and n and E denotes the event of choosing even numbered urn, then P (W/E) is
(IIT 2006).

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