The brown solution obtained when nitric oxide (NO) is absorbed in cold ferrous sulphate `(FeSO_(4))` solution is due to formation of -

Options

A. paramagetic `[Fe(H_(2)O)_(5)(NO)]SO_(4)`
B. diamagetic `[Fe(H_(2)O)_(5) (N_(3))]SO_(4)`
C. paramagentic `[Fe(H_(2)O)_(5) (NO)_(3)](SO)_(4)`
D. diamgnetic `[Fe(H_(2)O)_(4)(SO_(4))] NO_(3)`

Answer

A

Explanation

`FeSO_(4) + 6H_(2)O to [Fe(H_(2)O)_(6)]SO_(4) [Fe(H_(2)O)_(6)]SO_(4) + NO to [Fe (H_(2)underset("brown)O)_(5) NO] SO_(4) + H_(2)O`
The complex formed is paramagentic .