Question

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Correct option is

$K_{a}$ for cyno acetic acid= $3.5×10_{−3}$

=$K_{a}cK_{w} $

Substituting the values we get,

$3.5×10_{−3}×0.051×10_{−14} $ ($K_{w}$=$1×10_{−14}$)

On solving we get,

$7.559×10_{−6}$

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