MCQ
If reaction is started with $NH_4COONH_2(s)$ and equilibrium mixture has pressure of $3\, atm$ then $K_P$ for $NH_4COONH_2(s)  \rightleftharpoons  2NH_3(g) + CO_2(g)$ is .....$atm^3$
  • $4$
  • B
    $27$
  • C
    $\frac{4}{{27}}$
  • D
    $\frac{1}{{27}}$

Answer

Correct option: A.
$4$
a
$N{H_4}COON{H_2}(s) \rightleftharpoons 2N{H_3}(g) + C{O_2}(g)$

$P_e$ $:$                                          $2\,P$               $P$

                                               $=2\times 1$         $=1\,atm$

                                               $=2\,atm$

$\therefore \mathrm{K}_{\mathrm{P}}=\left(\mathrm{P}_{\mathrm{NH}_{3}}\right)^{2} \times \mathrm{P}_{\mathrm{CO}_{2}}=2^{2} \times 1\, \mathrm{atm}^{3}=4\, \mathrm{atm}^{3}$

(given $2 \mathrm{P}+\mathrm{P}=3, \mathrm{P}=1)$

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