A metal `M` reacts with `N_(2)` to give a compound `'A'(M_(3)N)`. 'A' on heating at high temperature gives back `'M'` and `'A'` on reacting with `H_(2)O` gives a gas 'B'.'B' turns `CuSO_(4)` solution blue on passing through it `A` and `B` can be

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 aqueous solution of CuSO_(4) to form a deep blue compound. ‘M’ and ‘B’ 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 reaction with water produces a gas ‘B’. Gas ‘B’ reacts with aqueous solution of CuSO_(4) to form a deep blue compound. ‘M’ and ‘B’ respectively are :

CuSO_(4) reacts with NH_(3) to give blue complex of

A metal X on heating in nitrogen gas gives Y,Y on treatment with H_(2)O gives a colourless gas which when passed through CuSO_(4) solution gives a blue colour. Y is:

A metal X on heating in nitrogen gas gives Y,Y on treatment with H_(2)O gives a colourless gas which when passed through CuSO_(4) solution gives a blue colour. Y is: