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$2AB_{2(g)} \rightleftharpoons 2AB_{(g)} + B_{2(g)}$
The degree of dissociation is $x$ and is small compared to $1.$ The expression relating the degree of dissociation $(x)$ with equilibrium constant $K_P$ and total pressure $P$ is

$\operatorname{P} t|{H_{{2_{\left( {2\,atm} \right)}}}}|H_{\left( {0.002\,M} \right)}^ \oplus ||H_{\left( {0.1\,M} \right)}^ \oplus |{H_{{2_{\left( {1\,atm} \right)}}}}|Pt$
At the instant $3$ min, what change was imposed into the equilibrium ?
(Given : $\left.pK _{ a }\left( CH _{3} COOH \right)=4.76\right)$
$\log 2=0.30$ $\log 3=0.48$ $\log 5=0.69$ $\log 7=0.84$ $\log 11=1.04$
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