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  3. Chemistry
  4. For the reaction: H2 + Cl2 xrightarrow textsunlight 2HCl the order of reaction is

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Q. For the reaction :
$H_2 + Cl_2 \xrightarrow{\text{sunlight}} 2HCl$
the order of reaction is

AIIMSAIIMS 2002Chemical Kinetics

Solution:

Photochemical reaction between $H _{2}$ and $Cl _{2}$ is zero order reaction, the concentration of gases per unit volume in the gascous phase will not change with time, although the quantities will change.