MCQ
The one which is unimolecular reaction is
- A$2HI \to {H_2} + {I_2}$
- ✓${N_2}{O_5} \to {N_2}{O_4} + \frac{1}{2}{O_2}$
- C${H_2} + C{l_2} \to 2HCl$
- D$PC{l_3} + C{l_2} \to PC{l_5}$
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$n - Bu -\equiv\frac{(i) n-BuLi,n - C _{5} H _{11} Cl}{(ii) Lindlar\,\, cat, H _{2}}$

$A_{(g)} \longrightarrow B_{(g)} + C_{(g)}$
The initial pressure of the system before deomposition of $A$ was $P_i$. After time $'t'$ total pressure of the system increased by $x\, units$ and become $'P_t'$. The rate constant $k$ for reaction is given as