Identify the salt which may give slightly acidic or slightly alkaline solution.

K_{2} S O_{4}

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N a H C O_{3}

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(N H_{4})_{2} C O_{3}

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H C O O N H_{4}

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Solution

The correct option is B $N a H C O_{3}$
Sodium hydrogen carbonate $N a H C O_{3}$ may give slightly acidic or slightly alkaline solution as it is amphoteric in nature. It can accept a proton to form carbonic acid. Thus it behaves as a base.
$N a H C O_{3} + H_{2} O \to H_{2} C O_{3} + N a^{+} + O H^{-}$
It can also donate a proton to form carbonate ion. Thus it acts as an acid.
$N a H C O_{3} + H_{2} O \to N a^{+} + C O_{3}^{2 -} + H_{3} O^{+}$

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You are supplied with five solutions : A, B, C, D and E with $p^{H}$ values as follows:

A = 1.8, B = 7, C = 8.5, D = 13, and E = 5

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[N i ({e n}_{3})] {({N O}_{3})}_{2}

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