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An orange solid (A) on heating gives a g...

An orange solid (A) on heating gives a green residue (B), a colourless gas (C) and water vapours. The dry gas (C) upon passing over heated Mg gave a white solid (D) which upon subsequent reaction with water gave a gas (E) that gave dense white fumes with HCl. Identify (D

A

`Fe(NH_(3))Cl_(2)`

B

`CuN_(2)`

C

`Mg_(3)N_(2)`

D

`NH_(4)Cl`

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