Problem

In the reaction

NH_4NO_2(aq.) \rightarrow N_2(g) + 2H_2O(l)

the volume of

N_2

after 20 min and after a long time is 40 ml and 70 ml respectively. The value of rate constant is: (a)

(1/20) \log (7/4) \text{ min}^{-1}

(b)

(2.303/1200) \log (7/3) \text{ sec}^{-1}

(c)

(1/20) \log (7/3) \text{ min}^{-1}

(d)

(2.303/20) \log (11/7) \text{ min}^{-1}