An orange solid (A) on heating gave a gr...

An orange solid `(A)` on heating gave a green residue `(B)`, colourless gas `( C)` and water vapour. The dry gas `( C)` on passing over heated magnesium gave a white solid `(D).(D)` on reaction with water have a gas `( E)` which formed dense white fumes with `HCl`. Indentify `(A)` to `( E)` and give the reactions.

It gives a deep blue coluration with `CuSO_(4)` solution

It is oxidised to a colourless gas (neutral oxide) at 1200 K in presence of a catalyst Pt/Rh in air

It gives the same gas (C) with potassium permanganate solution

It gives black precipitate with `HgCl_(2)`

Text Solution

Verified by Experts

The correct Answer is:

`(E) = NH_(3)`
`(A) Cu^(2+) + 4NH_(3) rarr [Cu(NH_(3))_(4)]^(2+)` (deep blue colouration)
`(D) HgCl_(2) + NH_(3) + H_(2)O rarr HgO.Hg(NH_(2))Cl darr` (white)

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