Which of the following salt when dissolved in water get hydrolysed to form an acidic solution?

NaCl

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KCl

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Solution

The correct option is B

${N H}_{4} C l$ is hydrolysed in water to give [ $H^{+}$ ]. ${N H}_{4} C l$ is formed when a weak base and a strong acid react, therefore it is an acidic salt.

${N H}_{4} C l + H . O H \Leftrightarrow {N H}_{4} O H + H C l$

${N H}_{4}^{+} + H . O H \Leftrightarrow {N H}_{4} O H + H^{+}$

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