Benzene diazonium chloride in aqueous solution decomposes as :
${\text{C}}_6{\text{H}}_5-\text{N}={\text{N}}^{+}{\text{Cl}}_{\left(\text{aq}\right)}^{-}+{\text{H}}_2{\text{O}}_{\left(\text{aq}\right)}⟶{\text{C}}_6{\text{H}}_5{\text{OH}}_{\left(\text{aq}\right)}+{\text{N}}_{2\left(\text{g}\right)}+{\mathrm{HCl}}_{\mathrm{(aq)}}$
The reaction follows first order kinetics. If p_t is the pressure of N₂ at constant volume and temperature corresponding to different intervals of time t and p_f that after completion of the reaction, then which of the following graphs conforms to the kinetics of the reaction ?

• A

  
• B

  
• Correct answer
  C

  
• D

  

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