Assertion: [Fe(H2O)5NO]SO4 is paramagnetic. Reason: The Fe in [Fe(H2O)5NO]SO4 has three unpaired electrons.

Question

Assertion: [Fe(H2O)5NO]SO4 is paramagnetic. Reason: The Fe in [Fe(H2O)5NO]SO4 has three unpaired electrons. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

Fe+: [Ar] 3d6 4s1 When the weak field ligand H2O and strong field ligand NO attack, the configuration changes as follows: Fe+: [Ar] 3d7 4s0 ∴ Fe+ has 3 unpaired electrons.

Q. Assertion : $[F e (H_{2} O)_{5} NO] S O_{4}$ is paramagnetic.
Reason : The $F e$ in $[F e (H_{2} O)_{5} NO] S O_{4}$ has three unpaired electrons.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Fe⁺ : [Ar] 3d⁶ 4s¹
When the weak field ligand H₂O and strong field ligand NO attack, the configuration changes as follows:
Fe⁺ : [Ar] 3d⁷ 4s⁰
∴ Fe⁺ has 3 unpaired electrons.

Q. Assertion : [Fe(H2​O)5​NO]SO4​ is paramagnetic. Reason : The Fe in [Fe(H2​O)5​NO]SO4​ has three unpaired electrons.