First slide

Hydrogen

Question

Electrolysis of molten saline hydride generally gives

Easy

A

hydrogen at cathode
B

hydrogen at anode
C

oxygen at cathode
D

oxygen at anode

Solution

$\large NaH{\text{ }} \to {\text{ }}N{a^ + } + {\text{ }}{{\text{H}}^ \circleddash }$

[Saline hydride]
At anode:
$\large \[{{\text{H}}^ \ominus }\; \to \;\frac{1}{2}{H_2}\; + \;{e^ - }\]$

At cathode : Na⁺ + e^- →Na_(s)
Molten state of saline hydride on electrolysis liberates H₂-gas at anode.

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