Which compound on electrolysis produces H_2 g | vedclass

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Question

(C) In molten ionic hydrides like $NaH$,the hydride ion $(H^-)$ is present. During electrolysis,the following reactions occur: At the anode: $2H^- \ri

Vedclass · Accepted Answer

$NaH$ (molten)

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(C) In molten ionic hydrides like $NaH$,the hydride ion $(H^-)$ is present. During electrolysis,the following reactions occur: At the anode: $2H^- \rightarrow H_2(g) + 2e^-$. At the cathode: $Na^+ + e^- \rightarrow Na(s)$. However,for $MgH_2$ (molten) or $NaH$ (molten),the electrolysis of the hydride ion produces $H_2$ at the anode. Specifically,for molten $NaH$,$H_2$ is produced at the anode. If we consider the electrolysis of $NaH$ (molten),the reaction at the cathode is $Na^+ + e^- \rightarrow Na$. Actually,the question refers to the electrolysis of ionic hydrides where $H^-$ is oxidized to $H_2$ at the anode. Among the given options,$NaH$ (molten) is the standard example where $H_2$ is evolved at the anode. Note: In some contexts,if $H_2$ is produced at both,it implies a specific setup,but for standard ionic hydrides,$H_2$ is produced at the anode.

Which compound on electrolysis produces $H_2$ gas at both electrodes?

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