Question

The following data are for the decomposition of ammonium nitrite in aqueous solution

Vol. of $N_2$ in cc	Time (min.)
6.25	10
9.00	15
11.40	20
13.65	25
35.65	$\infty$

The order of reaction is

• A. zero
• B. one
• C. two
• D. three

Answer 1

Answer: (B)

For first order reaction
$k=\frac{2.303}{t} \log \frac{a}{a-x}$
$a \propto V_{\infty}(=35.05)$ and $x \propto V_{t}$
constant values of $k$ calculated for different times shows first order reaction.