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Correct formula of the complex formed in...

Correct formula of the complex formed in the brown ring test for `NO_3^(-)` is :

A

`FeSO_4.NO`

B

`[Fe(H_2O)_5 NO]^(2+)`

C

`[Fe(H_2O)_5NO]^(+) `

D

`[Fe(H_2O)_4 (NO_2)_2]`

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The correct Answer is:
B
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