If degree of dissociation is \( 0.01 \) of decimolar solution of weak acid \( \mathrm{H} A \) th...

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If degree of dissociation is \( 0.01 \) of decimolar solution of weak acid \( \mathrm{H} A \) then \( \mathrm{p} K_{a} \) of acid is :
(a) 2
(b) 3
(c) 5
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