JEE Main 2016 Chemistry question

Not in JEE Main or NEET syllabus

Identify the reaction which does not liberate hydrogen

Answer: (1)

Solution

Lithium hydride and diborane combine to give lithium borohydride, with all the hydrogen retained in the product and none released as gas:

2LiH + B_2H_6 → 2LiBH_4.

This is option (1). Each of the others does evolve hydrogen: electrolysis of acidified water liberates at the

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Question ID VK-115622