Q. Which of the following salts undergoes hydrolysis?

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$Na_{2}SO_{4}$

$CH_{3}COOK$

$KNO_{3}$

NaBr

Solution:

$Na_{2}SO_{4},NaBr$ and $KNO_{3}$ are the salts of strong acids and strong bases, so they do not undergo hydrolysis. $CH_{3}COOK$ is salt of weak acid, $CH_{3}COOH$ and strong base KOH, so it hydrolyses to give basic solution (i.e., $pH>7$ )
$CH_{3}COO^{-}K+HOH \rightarrow \underset{\left(\right. w e a k a c i d \left.\right)}{C H_{3} C O O H}+\underset{\left(\right. s t r o n g b a s e \left.\right)}{K O H}$

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