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A metal X on heating in nitrogen gas giv...

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 chloroplatinic acid produces yellow precipitate. `Y` is.

A

`Mg(NO_3)_2`

B

`Mg_3N_2`

C

`NaN_3`

D

MgO

Text Solution

Verified by Experts

The correct Answer is:
B
`underset((X))3Mg+N_2overset(Delta)to underset((Y))Mg_3N_2 " " , " "Mg_3N_2+6H_2Oto3Mg(OH)_2+2NH_3`(colourless gas)
`CuSO_4+4NH_3 to [Cu(NH_3)_4]SO_4` (blue colour )
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