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Preparation of Hydrogen

The metal whi...

Question

The metal which gives hydrogen on treatment with hydrochloric acid as well as sodium hydroxide is:

A

F e

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B

Z n

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C

C u

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D

All of the above

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Solution

The correct option is A $Z n$
Since $Z n$ is amphoteric in nature, it reacts with both acids and alkalis to give hydrogen.

The reactions are given below:
$Z n + 2 H C l \to Z n C l_{2} + H_{2}$
$Z n + 2 N a O H \to N a_{2} Z n O_{2} + H_{2}$

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