A brown ring is formed in the ring test ...

A brown ring is formed in the ring test for `NO_(3)^(-)` ion. It is due to the formation of

A

there are three unpaired electrons so that its magnetic moment is 3.87 BM

B

NO transfer its electron to `Fe^(2+)` so that iron as Fe (I) and NO as `NO^(+)`

C

the colour is because of charge transfer

D

All of the above statements are correct

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The correct Answer is:

D

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