The rate of the reaction, $2 \mathrm{NO}+\mathrm{Cl}_2 \longrightarrow 2 \mathrm{NOCl}$ is given by the rate equation, rate $=\mathrm{k}[\mathrm{NO}]^2\left[\mathrm{Cl}_2\right]$ The value of the rate constant can be increased by

• Correct answer
  A

  increasing the temperature
• B

  increasing the concentration of NO
• C

  increasing the concentration of the $\mathrm{Cl}_2$
• D

  doing all of the above

Hence, the correct answer is option: 'A'.