Which of the following does not undergo hydrolysis?

F e S O_{4}

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K_{2} C O_{3}

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C H_{3} C O O N H_{4}

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N a_{2} S O_{4}

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Solution

The correct option is C $N a_{2} S O_{4}$
$N a_{2} S O_{4}$ is a salt of strong acid and strong base. Salt of strong acid and strong base will not undergo hydrolysis.
$N a_{2} S O_{4} \to H_{2} S O_{4} \to$ strong acid and $N a O H \to$ strong base
$∴ N a_{2} S O_{4}$ will not undergo hydrolysis.
Whereas $F e S O_{4}$ is a salt of weak base $F e (O H)_{2}$ and strong acid $H_{2} S O_{4}$ , $K_{2} C O_{3}$ is a salt of strong base $K O H$ and weak acid $H_{2} C O_{3}$ . And $C H_{3} C O O N H_{4}$ is a salt of weak acid $C H_{3} C O O H$ and weak base $N H_{4} O H$ thus all these salt will undergo hydrolysis.

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