Certain bimolecular reactions which follow the first order kinetics are called

For an elementary chemical reaction, ${A_2} \underset{{{k_{ - 1}}}}{\overset{{{k_1}}}{\longleftrightarrow}} 2A$ the expression for $\frac{{d\left[ A \right]}}{{dt}}$ is

The rate of disappearance of $S{O_2}$ in the reaction $2S{O_2} + {O_2} \to 2S{O_3}$ is $1.28 \times {10^{ - 3}}g/sec$ then the rate of formation of $S{O_3}$ is

The elementary reaction $2SO_2(g) + O_2(g) \to 2SO_3(g)$ is carried out in $1\, dm^3$ vessel and $2\,dm^3$ vessel separately. The ratio of the reaction velocities will be

The reaction $2{N_2}{O_5}$ $\rightleftharpoons$ $2N{O_2} + {O_2}$ follows first order kinetics. Hence, the molecularity of the reaction is

For a certain reaction the expression for half life is $t \propto \frac{1}{{{a^{n - 1}}}}$ then the order of reaction is