Question

Identify the reaction which does not liberate hydrogen :

• A. Reaction of zinc with aqueous alkali.
• B. Electrolysis of acidified water using $Pt$ electrodes.
• C. Allowing a solution of sodium in liquid ammonia to stand.
• D. Reaction of lithium hydride with $B_2H_6$

Answer 1

Answer: (D)

Reaction of lithium hydride with $B_2H_6$

Answer 2

Sodium is added to liquid ammonia, producing a solution containing solvated electrons and used as reducing agent.
$2LiH + B_2H_6 \to 2Li[BH_4]$ Complex and do not liberate $H_2$ gas.