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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 reaction with water produces a gas B . Gas B reacts with an aqueous solution of CuSO 4 to form a deep blue compound. M and B respectively are

Options

  1. ALi and NH 3 .
  2. BBa and NH 3 .
  3. CNa and N 2 .
  4. DAl and N 2 .

Correct answer

A. Li and NH 3 .

Step-by-step solution

The given sequence of unbalanced reactions represents the above process.

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