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  4. Which one of the following salts gives an acidic solution in water?

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Q. Which one of the following salts gives an acidic solution in water?

Chhattisgarh PMTChhattisgarh PMT 2007

Solution:

Salt formed between strong acid and weak base, solution of such type of salt is acidic in nature.
$NH _{4} Cl$ is an example of such type of salt.
$NH _{4}^{+}+ Cl ^{-}+ H _{2} O \rightleftharpoons NH _{4} OH + H ^{+}+ Cl ^{-}$
since, $Cl ^{-}$common on both sides.
$NH _{4}^{+}+ H _{2} O \rightarrow NH _{4} OH + H ^{+}$