MCQ
If dissociation for reaction, $PC{l_5}$ $\rightleftharpoons$ $PC{l_3} + C{l_2}$ is $20\%$ at $1$ $atm$. pressure. Calculate ${K_c}$
- A$0.04$
- ✓$0.05$
- C$0.07$
- D$0.06$
✓
Answer
Correct option: B.
$0.05$
(b) ${K_c} = \frac{{[PC{l_3}][C{l_2}]}}{{[PC{l_5}]}} = \frac{{\left[ {\frac{{20}}{{100}}} \right] \times \left[ {\frac{{20}}{{100}}} \right]}}{{\left[ {\frac{{80}}{{100}}} \right]}}$
$ = \frac{{0.2 \times 0.2}}{{0.8}} = \frac{{0.04}}{{0.8}} = 0.05$
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