AIIMS2012ChemistryCoordination Compounds
Assertion : [ Fe ( H ₂ O )₅ NO ] SO ₄ is paramagnetic. Reason : The Fe in [ Fe ( H ₂ O )₅ NO ] NO ₄ has three unpaired electrons.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion
- BIf both assertion and reason are true but reason is not the correct explanation of assertion
- CIf assertion is true but reason is false
- DIf both assertion and reason are false.
Correct answer
A. If both assertion and reason are true and reason is the correct explanation of assertion
Step-by-step solution
(a) : Fe ⁺:[ Ar ] 3 d^6 4 s^1 When the weak field ligand H ₂ O and strong field ligand NO attack, the configuration changes as follows: Fe ⁺:[ Ar ] 3 d^7 4 s^0 Fe ⁺ has 3 unpaired electrons.