Q.

Statement 1: FeH2O5NOSO4 is paramagnetic.Statement 2: The Fe in FeH2O5NOSO4 has three unpaired electrons.

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a

Both statements 1 and 2 are correct

b

Statement 1 is correct statement 2 is incorrect

c

Statement 1 is incorrect statement 2 is correct

d

Both statements 1 and 2 are incorrect

answer is A.

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Detailed Solution

Iron in FeH2O5NOSO4 exists in +2 oxidation state having electronic configuration (3d)6. The unpaired electron of NO is shifted to Fe2+ changing it to Fe+ and also changes NO to NO+. The electronic configuration of iron in the complex thus becomes (3d)7 with three unpaired electrons as in the complex, sp3d2-hybridization exists.
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