The law of photochemical equivalence was given by

If $I$ is the intensity of absorbed light and $C$ is the concentration of $AB$ for the photochemical process $AB + h\nu \to AB^*$,the rate of formation of $AB^*$ is directly proportional to

For a photochemical reaction,if the intensity of absorbed light is $I$ and the concentration of $AB$ is $C$. Given the reaction $AB + h\nu \rightarrow AB^*$,the rate of formation of $AB^*$ is proportional to:

For the reaction taking place in the presence of sunlight,the order of reaction is
$H_2 + Cl_2 \xrightarrow{\text{Sunlight}} 2HCl$

In a photochemical reaction,the ratio of the number of dissociated molecules to the number of quanta of absorbed energy is called:

Silver nitrate is usually kept in coloured bottles because it is