1.For a reaction 3A -> 2B, the concentration of B increases from 0.4 mol L^{-1} to 0.7 mol l ^{-1} in 3 minutes.
The rate of reaction during this interval is :

(A) 0.033 mol L^{-1} min^{-1}

(B) 0.05 mol L^{-1} min^{-1}

(C) 0.1 mol L^{-1} min^{-1}

(D) 0.3 mol L^{-1} min^{-1}

Ans: (B) 0.05 mol L^{-1} min^{-1}

2. The first order decomposition of a certain gas has an initial rate of 216 atm s^{-1}.The rate after 25 percent decomposition of the gas is:

(A) 54 atm s^{-1}

(B) 108 atm s^{-1}

(C) 162 atm s^{-1}

(D) 216 atm s^{-1}

Ans: (C) 162 atm s^{-1}

3. At a temperature of T=300K there are 30% molecules with kinetic energy greater than the acivation energy.
According to Arrhenius equation, the fraction of the molecules which will have kinetic energy greater than the activation energy
at 150K [Assume that the activation energy is independent of temperature] is:

(A) 0.09

(B) 0.15

(C) 0.30

(D) 0.90

Ans: (A) 0.09

4. Which property does *NOT* change on addition of a catalyst ?

(A) Activation energy

(B) Rate Constant

(C) Reaction mechanics

(D) Equilibrium constant

Ans: (D) Equilibrium constant

5. The reaction 2A -> B follows zero order kinetics with rate constant k.The slope of the plot of concentration of A against time is :

(A) -2k

(B) -k

(C) -k/2

(D) k

Ans: (A) -2k