Question

When electric current is passed through an ionic hydride in the molten state.

• A. Hydrogen is liberated at the anode
• B. Hydrogen is liberated at the cathode
• C. No reaction takes place
• D. Hydride ion migrates towards cathode

Answer 1

Answer: (A)

Hydrogen is liberated at the anode

Answer 2

$M^{+}H^{-} \rightarrow M^{+} + \underset{\text{Hydride ion}}{H^{-}\mspace{6mu}\mspace{6mu}}$

$H^{-} \rightarrow \frac{1}{2}H_{2} + e^{-}$ (At anode