315919
What happens when ionic hydrides of s-block elements in molten state are electrolysed?
1 Hydride ion migrates at cathode
2 Dihydrogen is liberated at cathode
3 Hydride ion reforms metal hydride
4 Dihydrogen is liberated at anode
Explanation:
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 \(\left(\mathrm{H}^{-}\right)\). Following reactions takes place: \({\text{MH(l)}} \rightleftharpoons {{\text{M}}^{\text{ + }}}{\text{(aq) + }}{{\text{H}}^{\text{ - }}}{\text{(aq)}}\) At cathode \(\mathrm{M}^{+}(\mathrm{aq})+\mathrm{e}^{-} \longrightarrow \mathrm{M}(\mathrm{s})\) At anode \({\rm{2}}{{\rm{H}}^{\rm{ - }}}{\rm{(aq) + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2H(g)}}\) \({\rm{H + H}} \to {{\rm{H}}_{\rm{2}}}{\rm{(\;g)}}\)
MHTCET - 2019
CHXI10:THE S-BLOCK ELEMENTS
315920
The hydration energy of \({\rm{M}}{{\rm{g}}^{{\rm{2 + }}}}\) is greater than that of
315919
What happens when ionic hydrides of s-block elements in molten state are electrolysed?
1 Hydride ion migrates at cathode
2 Dihydrogen is liberated at cathode
3 Hydride ion reforms metal hydride
4 Dihydrogen is liberated at anode
Explanation:
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 \(\left(\mathrm{H}^{-}\right)\). Following reactions takes place: \({\text{MH(l)}} \rightleftharpoons {{\text{M}}^{\text{ + }}}{\text{(aq) + }}{{\text{H}}^{\text{ - }}}{\text{(aq)}}\) At cathode \(\mathrm{M}^{+}(\mathrm{aq})+\mathrm{e}^{-} \longrightarrow \mathrm{M}(\mathrm{s})\) At anode \({\rm{2}}{{\rm{H}}^{\rm{ - }}}{\rm{(aq) + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2H(g)}}\) \({\rm{H + H}} \to {{\rm{H}}_{\rm{2}}}{\rm{(\;g)}}\)
MHTCET - 2019
CHXI10:THE S-BLOCK ELEMENTS
315920
The hydration energy of \({\rm{M}}{{\rm{g}}^{{\rm{2 + }}}}\) is greater than that of
315919
What happens when ionic hydrides of s-block elements in molten state are electrolysed?
1 Hydride ion migrates at cathode
2 Dihydrogen is liberated at cathode
3 Hydride ion reforms metal hydride
4 Dihydrogen is liberated at anode
Explanation:
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 \(\left(\mathrm{H}^{-}\right)\). Following reactions takes place: \({\text{MH(l)}} \rightleftharpoons {{\text{M}}^{\text{ + }}}{\text{(aq) + }}{{\text{H}}^{\text{ - }}}{\text{(aq)}}\) At cathode \(\mathrm{M}^{+}(\mathrm{aq})+\mathrm{e}^{-} \longrightarrow \mathrm{M}(\mathrm{s})\) At anode \({\rm{2}}{{\rm{H}}^{\rm{ - }}}{\rm{(aq) + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2H(g)}}\) \({\rm{H + H}} \to {{\rm{H}}_{\rm{2}}}{\rm{(\;g)}}\)
MHTCET - 2019
CHXI10:THE S-BLOCK ELEMENTS
315920
The hydration energy of \({\rm{M}}{{\rm{g}}^{{\rm{2 + }}}}\) is greater than that of
315919
What happens when ionic hydrides of s-block elements in molten state are electrolysed?
1 Hydride ion migrates at cathode
2 Dihydrogen is liberated at cathode
3 Hydride ion reforms metal hydride
4 Dihydrogen is liberated at anode
Explanation:
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 \(\left(\mathrm{H}^{-}\right)\). Following reactions takes place: \({\text{MH(l)}} \rightleftharpoons {{\text{M}}^{\text{ + }}}{\text{(aq) + }}{{\text{H}}^{\text{ - }}}{\text{(aq)}}\) At cathode \(\mathrm{M}^{+}(\mathrm{aq})+\mathrm{e}^{-} \longrightarrow \mathrm{M}(\mathrm{s})\) At anode \({\rm{2}}{{\rm{H}}^{\rm{ - }}}{\rm{(aq) + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2H(g)}}\) \({\rm{H + H}} \to {{\rm{H}}_{\rm{2}}}{\rm{(\;g)}}\)
MHTCET - 2019
CHXI10:THE S-BLOCK ELEMENTS
315920
The hydration energy of \({\rm{M}}{{\rm{g}}^{{\rm{2 + }}}}\) is greater than that of
