For which of the following $K_{\mathrm{p}}$ may be equal to $0.5$ atm

For which of the following $K_{\mathrm{p}}$ may be equal to $0.5$ atm
  1. $2 \mathrm{HI} ightleftharpoons \mathrm{H}_{2}+\mathrm{I}_{2}$
  2. $\mathrm{PCl}_{5} ightleftharpoons \mathrm{PCl}_{3}+\mathrm{Cl}_{2}$
  3. $\mathrm{N}_{2}+3 \mathrm{H}_{2} ightleftharpoons 2 \mathrm{NH}_{3}$
  4. $2 \mathrm{NO}_{2} ightleftharpoons \mathrm{N}_{2} \mathrm{O}_{4}$

Solution

For $K_{p}=0.5$ atm
$\Delta \mathrm{n}=1$ (since the unit is atm)
and $\mathrm{PCl}_{5} ightleftharpoons \mathrm{PCl}_{3}+\mathrm{Cl}_{2}$
$\Delta \mathrm{n}=1$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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