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What happens when ionic hydrides of s-block elements in molten state are electrolysed?A. Hydride ion migrates at cathodeB. Dihydrogen is liberated at cathodeC. Hydride ion reforms metal hydrideD. Dihydrogen is liberated at anode |
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Answer» Correct Answer - D When ionic hydrides of s-block elements are subjected to electrolysis, dihydrogen gas is liberated at anode which confirms the existence of hydrogen in the form of hydride ion `(H^(-))`. Following reactions takes place: `MH(l)hArrM^(+)(aq)+H^(-)(aq)` At cathode `M^(+)(aq)+e^(-)toM(s)` At anode `2H^(-)(aq)-2e^(-)to2H(g)` `H+HtoH_(2)(g)` |
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