JEE Main 2016 · 10 Apr · Shift 1 · Chemistry Q43

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ChemistrySingle correct+4 / -1Question 43 of 90

Identify the reaction which does not liberate hydrogen :

Reaction of zinc with aqueous alkali.

Electrolysis of acidified water using Pt electrodes.

Allowing a solution of sodium in liquid ammonia to stand.

Reaction of lithium hydride with

\ce{B2H6}

Answer and worked solution

Official answer: D

$\ce{2LiH + B2H6 -> 2LiBH4}$ releases no hydrogen. Zinc with alkali, electrolysis of water, and sodium in ammonia on standing ( $\ce{2Na + 2NH3 -> 2NaNH2 + H2}$ ) all do.

Topics:Preparation and properties of hydrogen Boranes

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JEE Main 2016 · 10 Apr · Shift 1, Chemistry question 43