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Binary Compounds - Hydrides

Which of the ...

Question

Which of the following metals directly combine with hydrogen gas to give a hydride?

A

Au

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B

Ni

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C

Ca

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D

Cu

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Solution

The correct option is D Ca
Amongst, $A u$ , $N i$ , $C a$ and $C u$ , $C a$ is the most reactive metal. So it easily combines with $H_{2}$ to form hydride while the other metals do not combine directly.

The reaction can be given as:-
$C a + H_{2} ⟶ C a H_{2}$

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