Which one of the following salt gives aqueous solution, which is weakly basic ?

N H_{4} H C O_{3}

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N a H S O_{4}

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N a H C O_{3}

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N a C l

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Solution

The correct option is A $N H_{4} H C O_{3}$
On dissociation of salt in aqueous solution
(A) ${N H}_{4} H {C O}_{3} + H_{2} O ⇌ {N H}_{4} O H + H_{2} {C O}_{3}$
(B) $N a H {C O}_{3} + H_{2} O ⇌ N a O H + H_{2} {C O}_{3}$
(C) $N a H {C O}_{3} + H_{2} O ⇌ N a O H + H_{2} {C O}_{3}$
(D) $N a C l + H_{2} O ⇌ N a O H + H C l$
Hence in (A) ${N H}_{4} O H$ a weak base is formed

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N a H C O_{3}

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