Verified Solution • 2025–26 Session
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QNEET-2024-Ch-35: NEET 2024 Chemistry - Class 12 NEET-2024-Ch-35 Solution: Given below are two statements: Statement I: Both…
Given below are two statements: Statement I: Both and complexes are octahedral but differ in their magnetic behaviour. Statement II: is diamagnetic whereas is paramagnetic. In the light of the above statements choose the correct answer from the options given below
Multiple Choice Options
- A Both Statement I and Statement II are true
- B Both Statement I and Statement II are false
- C Statement I is true but Statement II is false
- D Statement I is false but Statement II is true
Step-by-Step Verified Solution
In [ Co ( NH 3 ) 6 ] 3 + , Co 3 + ion is having 3 d 6 configuration.
In presence of NH 3 ligand, pairing of electrons takes place and it becomes diamagnetic complex ion.
_ [ Co ( NH 3 ) 6 ] 3 + is octahedral with d 2 sp 3 hybridisation and it is diamagnetic in nature.
In case of [CoF6]3-, Co is in +3 oxidation state and it is having 3d6 configuration.
In presence of weak field F - ligand, pairing does not take place.
_ ln _ [ CoF 6 ] 3 _ , Co 3 + is sp 3 d 2 hybridised with four unpaired electrons, so it is paramagnetic in nature.