Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A metal M reacts with 
to give a compound 'A' 
. 'A' on heating at high temperature gives back 'M' and 'A' on reacting with 
gives a gas 'B'. 'B' turns 
solution blue on passing through it. A and B can be
A
Al and 
B
Li and 
C
Na and 
D
Mg and 
Text Solution
Verified by ExpertsThe correct answer is:
B
Lithium form nitride on heating with nitrogen. Lithium nitride gives ammonia when heated with 
. Ammonia gas form tetrammine copper complex with 
solution.
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