1.

The metal 'X' on heating with nitrogen gives compound 'Y' which dissolves in water to evolve a colourless gas. The gas on passing through CuSO_4 solution gives a blue colour. The compound 'Y' is

Answer»

`MG(NO_3)_2`
`Mg_3N_2`
`NH_3`
MgO

Answer :B


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