JEE MAIN - Chemistry (2017 - 8th April Morning Slot - No. 10)

A metal ‘M’ reacts with nitrogen gas to afford ‘M3N’. ‘M3N’ on heating at high temperature gives back ‘M’ and on reaction with water produces a gas ‘B’. Gas ‘B’ reacts with aqueous solution of CuSO4 to form a deep blue compound. ‘M’ and ‘B’ respectively are :
Li and NH3
Ba and N2
Na and NH3
Al and N2

Explanation

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