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JEE Main 20178 AprilOnline

Exam: JEE Main
Year: 2017
Date: 8 April
Mode: Online
Subject: Chemistry
Chapter: s Block Elements

JEE Main 2017 · 8 April · Online · Chemistry · s Block Elements

A metal M reacts with nitrogen gas to afford M _ 3 N , M _ 3 N on...

A metal

M

reacts with nitrogen gas to afford

{\text{M}}_{3} \text{N}

,

{\text{M}}_{3} \text{N}

on heating at high temperature gives back

M

and on reaction with water produces a gas

B

. Gas

B

reacts with an aqueous solution of

{CuSO}_{4}

to form a deep blue compound.

MandB

respectively are A metal M reacts with nitrogen gas to afford M _ 3 N , M _ 3 N on heating at high temperature gives back M and on

A metal M reacts with nitrogen gas to afford M _ 3 N , M _ 3 N on heating at high temperature gives back M and on

Options

A $Li$ and ${NH}_{3}$ .
B $Ba$ and ${NH}_{3 .}$
C $Na$ and ${N}_{2} .$
D $Al$ and ${N}_{2 .}$

Correct answer

A. $Li$ and ${NH}_{3}$ .

Step-by-step solution

The given sequence of unbalanced reactions represents the above process.

A metal M reacts with nitrogen gas to afford M _ 3 N , M _ 3 N on heating at high temperature gives back M and on

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