Question

$K$ for the synthesis of $HI$ is $50$. $K$ for dissociation of $HI$ is

• A. 50
• B. 5
• C. 0.2
• D. 0.02

Answer 1

The correct option is D

0.02

$K_1$ for $H_2+I_2\rightleftharpoons 2HI$ is $50$
$K_2$ for $2HI\rightleftharpoons H_2+I_2$
$K_2$ = $\frac{1}{K_1}$ = $\frac{1}{50}$ = $0.02$