First slide

Hydrogen

Question

Statement 1 : H₂ gas is liberated at anode because.
Statement 2 : Sodium hydride contains H^- ion.

Moderate

A

Both Statement 1 and Statement 2 are true.
B

Statement 1 is true and statement 2 is false.
C

Statement 1 is false and Statement 2 is true.
D

Both Statement 1 and Statement 2 are false.

Solution

NaH is crystalline hydride, it liberate H₂ at anode when electric current is passed through molten NaH
at anode $2 H^{-} \to H_{2} + 2 e^{-}$
at cathode $2 {Na}^{+} \to 2 e^{-} \to 2 Na$

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