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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.

A

The central atom(s) of the anion of solid (A) has `sp^(3)` hybridisation.

B

The orange sloid (A) is diamagnetic in nature.

C

The anoin of orange solid (A) is oxidising in nature.

D

None

Text Solution

Verified by Experts

The correct Answer is:
D
`A=(NH_(4))_(2)Cr_(2)O_(7)`
, all electrons are paired. So diamagnetic `(3d^(0)4s^(0))`
`Cr_(2)O_(7)^(2-)` acts as strong oxidising agent in acidic medium.
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