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The question consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses:
Assertion: `[Fe(H_2O)_5NO]SO_4` is paramagnetic.
Reason: The `Fe` in `[Fe(H_2O)_5NO]SO_4` has three unpaired electrons.

A

If both assertion and reason are correct and reason is correct explanation for assertion .

B

If both assertion and reason are correct but reason is not correct explanation for assertion .

C

If assertion is correct but reason is incorrect

D

If both assertion and reason are incorrect

Text Solution

Verified by Experts

The correct Answer is:
a
Reason is the correct explanation for assertion .
Oxidation state of Fe in complex x + 0 + 1 = +2 , or x = +1
`Fe^(+)` = `[Ar]3d^(6)4s^(1)` . Due to strong ligand field, one elctron is shifted from 4s to 3d sub-shell showing `d^(7)` configuration with three unpaired electrons .
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