Chemical Kinetics - True or False Type Questions

1. For a first order reaction, the rate of the reaction doubles as the concentration of the reactant(s) doubles. (1986)

Answer: True

Reason: For a first order reaction r = k[A].
Where r = rate of reaction
K = reaction constant
[A] = molar concentration of reactant
Hence if concentration doubles r also is doubled,.

2. Catalyst makes reaction more exothermic. (JEE 1987)

Ans: False
Catalyst does not affect the enthalpy of reaction. It affects only the rate of reaction.