Q. When electric current is passed through an ionic hydride in the molten state,
A) Hydrogen is liberated at the cathode
B) Hydrogen is liberated at the anode
C) Hydride ion migrates towards cathode
D) No reaction takes place
Explanation
(b)
$M^{+}H^{-} \rightarrow M^{+} + \ \ \ \ H^{-}\$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ hydride\ ion$
$H^{-} \rightarrow \frac{1}{2}H_{2} + e^{-}\ (at\ anode)$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.