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Binary Compounds - Hydrides

Hydrogen read...

Question

Hydrogen readily combines with these elements?

A

Na

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B

K

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C

Ca

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D

Zn

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Solution

The correct options are
A Na
B K
C Ca
$H_{2}$ easily reacts with $N a, C a, K$ as they are highly reactive metals and are placed at the top of the reactivity series.
$2 N a + H_{2} \to 2 N a H$
$2 K + H_{2} \to 2 K H$
$C a + H_{2} \to C a H_{2}$ .

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