Saturday, October 10, 2009

IIT-JEE-Chemistry-Final Revision Set No.52

All questions Assertion - Reason type.
State whether the first statement is right or wrong and whether the second statement is right explanation for the first statement in case the first statement is right.

S1-Butene on reaction with HBr in the presence of a peroxide produces 1-bromobutane.
S2. It involves the formation of primary radical.

S1. The first ionization energy of Be is greater than that of B.
S2. 2p orbital is lower in energy than 2s.

S1. The pressure of a fixed amount of an ideal gas is proportional to its temperature
S2. Frequency of collisions and their impact both increase in proportion to the square root of temperature.

Phenol is more reactive than benzene towards electrophilic substitution reaction.
S2. In the case of phenol, the intermediate carbocation is more resonance stabilized.

S1. The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero.
S2. The volume occupied by the molecules of an ideal gas is zero.

Source: JEE 2000

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