The complex \( \left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}\right]^{2...

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The complex \( \left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}\right]^{2+} \) is formed in the
\( \mathrm{P} \)
brown ring test for nitrates when freshly prepared
W
\( \mathrm{FeSO}_{4} \) solution is added to aq solution of \( \mathrm{NO}_{3}^{-} \) followed by addition of conc. \( \mathrm{H}_{2} \mathrm{SO}_{4} \). Select correct statement about this complex:
(1) Colour change is due to charge transfer
(2) It has iron in +1 oxidation state and nitrosyl as \( \mathrm{NO}^{+} \)
(3) It has magnetic moment of 3.87 B.M. confirming three unpaired electrons in \( \mathrm{Fe} \)
(4) All are correct statements
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