Question

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 : (1) li and nh3 (2) ba and n2 (3) na and nh3 (4) al and n2

Answer 1

The metal m reacts with nitrogen gas to afford m3n then on heating at high temperature gives back m and on reaction with water produces a gas b then the gas which is b reacts with the solution of cuso4 to form a deep blue compound .

The both elements a and b are ba and n2.

The name of the element barium with an atomic number 56.

n2 stands for nitrogen with an atomic number 7.