The termolecular reaction 2 ,NO(g) + Cl_ 2 (g) 2 ,NOCl(g) proceeds according to the…

CHEMISTRY · Single correct · A Level · Chemistry · Rate equations · Rate equations

Problem

The termolecular reaction

\mathrm{2\,NO(g) + Cl_{2}(g) \rightarrow 2\,NOCl(g)}

proceeds according to the mechanism whose first elementary step is rate-determining:

\mathrm{2\,NO + Cl_{2} \rightarrow 2\,NOCl} \;\; (\text{slow})

If the concentration of NO is tripled while the concentration of

\mathrm{Cl_{2}}

remains unchanged, by what factor is the initial rate expected to change? (a)

3

(b)

27

(c)

9

(d)

6