- 1(current)
Q. No.Given below are two statements :
Statement I : Both \(\left[\text{Co}\left(\text{NH}_3\right)_6\right]^{3+}\) and \(\left[\text{CoF}_6\right]^{3-}\) Complexes are octahedral but differ in their magnetic behaviour.
Statement II : \(\left[\text{Co}\left(\text{NH}_3\right)_6\right]^{3+}\) is diamagnetic whereas \(\left[\text{CoF}_6\right]^{3-}\) is paramagnetic.
In the light of the above statements, choose the correct answer from the options given below:
1. Both statement I and statement II are false.
2. Statement I is true and Statement II is false
3. Statement I is false but Statement II is true.
4. Both Statement I and Statement II are true.
Statement I : Both \(\left[\text{Co}\left(\text{NH}_3\right)_6\right]^{3+}\) and \(\left[\text{CoF}_6\right]^{3-}\) Complexes are octahedral but differ in their magnetic behaviour.
Statement II : \(\left[\text{Co}\left(\text{NH}_3\right)_6\right]^{3+}\) is diamagnetic whereas \(\left[\text{CoF}_6\right]^{3-}\) is paramagnetic.
In the light of the above statements, choose the correct answer from the options given below:
1. Both statement I and statement II are false.
2. Statement I is true and Statement II is false
3. Statement I is false but Statement II is true.
4. Both Statement I and Statement II are true.
Subtopic: Â VBT, CFT & their Limitations |
 73%
From NCERT
NEET - 2024
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The correct 'spin only' magnetic moments of \([\text{CoF}_6]^{3-}\) and \(\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}\) respectively, are:
1, 0 BM and 4.9 BM
2. 0 BM and 0 BM
3. 4.9 BM and 0 BM
4. 4.9 BM and 4.9 BM
1, 0 BM and 4.9 BM
2. 0 BM and 0 BM
3. 4.9 BM and 0 BM
4. 4.9 BM and 4.9 BM
Subtopic: Â VBT, CFT & their Limitations |
 66%
From NCERT
NEET - 2024
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Match List -I with List-II
Choose the correct answer from the options given below:
1. A-IV, B-III, C-II, D-I
2. A-III, B-I, C-IV, D-II
3. A-I, B-II, C-III, D-IV
4. A-III, B-IV, C-II, D-I
| List -I (Complex ion) |
List -II (Hybridisation) |
||
| A. | \([\mathrm{Ni}(\mathrm{CN})_4]^{2-}\) | I. | \(s p^3 \) |
| B. | \(\mathrm{[CoF_6}]^{3-}\) | II. | \( d^2sp^3 \) |
| C. | \([\mathrm{Co}(\mathrm{C}_2 \mathrm{O}_4)_3 ]^{3-}\) | III. | \(s p^3d^2\) |
| D. | \(\left(\mathrm{NiCl}_4\right)^{2-}\) | IV. | \(dsp^2\) |
Choose the correct answer from the options given below:
1. A-IV, B-III, C-II, D-I
2. A-III, B-I, C-IV, D-II
3. A-I, B-II, C-III, D-IV
4. A-III, B-IV, C-II, D-I
Subtopic: Â VBT, CFT & their Limitations |
 68%
From NCERT
NEET - 2024
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The Crystal Field Stabilisation Energy (CFSE) and the 'spin only' magnetic moment of \(\mathrm{[FeF_6]^{3-}}\) ion respectively, are:
1. \(0~\Delta~\text{and}~5.9~\text{BM}\)
2. \(0~\Delta~\text{and}~1.73~\text{BM}\)
3. \(2.0~\Delta~\text{and}~5.9~\text{BM}\)
4. \(2.0~\Delta~\text{and}~1.73~\text{BM}\)
1. \(0~\Delta~\text{and}~5.9~\text{BM}\)
2. \(0~\Delta~\text{and}~1.73~\text{BM}\)
3. \(2.0~\Delta~\text{and}~5.9~\text{BM}\)
4. \(2.0~\Delta~\text{and}~1.73~\text{BM}\)
Subtopic: Â VBT, CFT & their Limitations |
 50%
From NCERT
NEET - 2024
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The order of energy absorbed which is responsible for the color of complexes is:
\((A) \ \left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}(\text { en })_{2}\right]^{2+}\)
\( (B) \ \left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\mathrm{en})\right]^{2+} and\)\( (C) \ \left[\mathrm{Ni}(\mathrm{en})_{3}\right]^{2+}\)
\((A) \ \left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}(\text { en })_{2}\right]^{2+}\)
\( (B) \ \left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{4}(\mathrm{en})\right]^{2+} and\)\( (C) \ \left[\mathrm{Ni}(\mathrm{en})_{3}\right]^{2+}\)
| 1. | B > A > C | 2. | A > B > C |
| 3. | C > B > A | 4. | C > A > B |
Subtopic: Â VBT, CFT & their Limitations |
 62%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
The correct order of spin-only magnetic moment for the given complexes is:
1. \([Co(H_2O)_6]^{2+} > [MnCl_6]^{3-} > [Fe(CN)_6]^{3-} \)
2. \([Fe(CN)_6]^{3-} >[Co(H_2O)_6]^{2+} > [MnCl_6]^{3-} \)
3. \([MnCl_6]^{3-} >[Fe(CN)_6]^{3-} >[Co(H_2O)_6]^{2+} \)
4. \([MnCl_6]^{3-} > [Co(H_2O_6]^{2+} > [Fe(CN)_6]^{3-} \)
Subtopic: Â VBT, CFT & their Limitations |
 58%
From NCERT
NEET - 2022
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Match Column I with Column II, Columns I and II represent complexes and magnetic moment (BM) respectively.
| Column I | Column II |
| (a). [FeCN6]3- | (i). 5.92 BM |
| (b). [Fe(H2O)6]3+ | (ii). 0 BM |
| (c). [Fe(CN)6]4- | (iii). 4.90 BM |
| (d). [Fe(H2O)6]2+ | (iv). 1.73 BM |
Choose the correct answer from the options given below:
| (a). | (b). | (c). | (d). | |
| 1. | (i). | (iii). | (iv). | (ii). |
| 2. | (iv). | (i). | (ii). | (iii). |
| 3. | (iv). | (ii). | (i). | (iii). |
| 4. | (ii). | (iv). | (iii). | (i). |
Subtopic: Â VBT, CFT & their Limitations |
 65%
From NCERT
NEET - 2021
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The crystal field stabilization energy (CFSE) for [CoCl6]4- is 18000 cm-1.
The CFSE for [CoCl4]2- will be:
1.
2.
3.
4.
Subtopic: Â VBT, CFT & their Limitations |
 69%
From NCERT
NEET - 2019
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NEET 2025 - Target Batch
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Links
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What is the correct electronic configuration of the central atom in based on crystal field theory?
1.
2.
3.
4.
Subtopic: Â VBT, CFT & their Limitations |
 84%
From NCERT
NEET - 2019
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NEET 2025 - Target Batch
Hints
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NEET 2025 - Target Batch
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