Assertion :When sodium hydride in fused state is electroysed, hydrogen is discharged at anode Reason: Sodium hydride is an electroovalent compound in which hydrogen is present as cation

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Sodium hydride is an electrovalent compound in which hydrogen is present as an anion, $H^{-}$ (hydride ion) which is discharged as $H_{2}$ at anode on electrolysis.
Oxidation at anode: $2 H^{-} \to H_{2} (g) + 2 e^{-}$ .
Reduction at cathode: $2 N a^{+} + 2 e^{-} \to 2 N a$ .

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