Q12 / 75 · JEE Main 2025 (2 Apr Shift 1) · Chemistry
Given below are two statements :
Statement (I) : In octahedral complexes, when \(\Delta_{\mathrm{o}} \lt \mathrm{P}\) high spin complexes are formed. When \(\Delta_{\mathrm{o}} \gt \mathrm{P}\) low spin complexes are formed.
Statement (II) : In tetrahedral complexes because of \(\Delta_{\mathrm{t}} \lt \mathrm{P}\), low spin complexes are rarely formed.
In the light of the above statements, choose the most appropriate answer from the options given below :
Statement (I) : In octahedral complexes, when \(\Delta_{\mathrm{o}} \lt \mathrm{P}\) high spin complexes are formed. When \(\Delta_{\mathrm{o}} \gt \mathrm{P}\) low spin complexes are formed.
Statement (II) : In tetrahedral complexes because of \(\Delta_{\mathrm{t}} \lt \mathrm{P}\), low spin complexes are rarely formed.
In the light of the above statements, choose the most appropriate answer from the options given below :
- AStatement I is correct but Statement II is incorrect.
- BBoth Statement I and Statement II are incorrect
- CStatement I is incorrect but Statement II is correct
- Correct answerDBoth Statement I and Statement II are correct
Solution
In octahedral complex \((\mathrm{CN}=6)\)
If \(\Delta_0 \lt \) P.E., then high spin complexes are formed
If \(\Delta_0 \gt \) P.E., then low spin complexes are formed But in tetrahedral complex \((\mathrm{CN}=4)\)
\(\Delta_t \lt \) P.E., then mainly high spin complexes are formed and rarely low spin complexes are formed.
If \(\Delta_0 \lt \) P.E., then high spin complexes are formed
If \(\Delta_0 \gt \) P.E., then low spin complexes are formed But in tetrahedral complex \((\mathrm{CN}=4)\)
\(\Delta_t \lt \) P.E., then mainly high spin complexes are formed and rarely low spin complexes are formed.
Hence, the correct answer is option: 'D'.