NEET UG CHEMISTRY MCQ: HYDROGEN

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A molten ionic hydride on electrolysis gives

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Correct option: C

{H_2}

liberated at anode

Option C (

{H_2}

liberated at anode) is correct because in molten ionic hydrides, the hydride ion (

{H^-}

) migrates to the anode and gets oxidized to form hydrogen gas.

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\mathrm{CaC}_2+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Ca}(\mathrm{OH})_2+' \mathrm{X}\,'

\mathrm{Mg}_2 \mathrm{C}_3+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Mg}(\mathrm{OH})_2+'\mathrm{Y}\,'

\mathrm{X}

\mathrm{Y}

{H_2}{O_2} \to 2{H^ + } + {O_2} + 2{e^ - };{E^0} = - 0.68V

{\mathrm{H}_\mathrm{2}}{\mathrm{O}_\mathrm{2}}

{\mathrm{H}_2}{\mathrm{O}_2}

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