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Extraction of Magnesium

Which gas is ...

Question

Which gas is liberated on electrolysis of molten saline hydrides ?

Hydrogen

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Oxygen

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Nitrogen

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Chlorine

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Solution

The correct option is A Hydrogen
On electrolysis, molten saline hydrides liberates $H_{2}$ gas at anode.
$2 H^{-} (molten) \to H_{2} (g) + 2 e^{-}$ (at anode)
Hence, correct option is a.

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