Q. No.What are the geometries of \([Ni(CO)_4]\) and \([Ni(PPh_3)_2Cl_2]\) respectively?
1. Both square planar.
2. Tetrahedral and square planar, respectively.
3. Both tetrahedral.
4. Square planar and tetrahedral, respectively.
Subtopic: VBT, CFT & their Limitations |
50%
Level 3: 35%-60%
Hints
Consider the given two statements:
| Assertion(A): | \([Fe(H_2O)_5NO]SO_4\) is paramagnetic. |
| Reason(R): | The \(Fe\) in \([Fe(H_2O)_5NO]SO_4\) has three unpaired electrons. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: VBT, CFT & their Limitations |
51%
Level 3: 35%-60%
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Consider the following statements:
The correct statement(s) is/are:
1. (a) and (b) only
2. (b) and (c) only
3. (c) only
4. (b) only
| (a) | Crystal field theory (CFT) considers the metal-ligand bond to be covalent, arising purely from overlapping between the metal ion and the ligand. |
| (b) | Octacarbonyldicobalt (0) has a Co-Co bond. |
| (c) | Ruby is an aluminium oxide (Al2O3) containing about 0.5–1% Zn2+ ions. |
1. (a) and (b) only
2. (b) and (c) only
3. (c) only
4. (b) only
Subtopic: VBT, CFT & their Limitations |
Level 3: 35%-60%
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Given below are two statements:
| Assertion (A): | and are reducing in nature. |
| Reason (R): | Unpaired electrons are present in their d-orbitals. |
| 1. | Both (A) and (R) are True, and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True, and (R) is not the correct explanation of (A). |
| 3. | (A) is True, but the (R) is False. |
| 4. | (A) is False, but (R) is True. |
Subtopic: VBT, CFT & their Limitations |
Level 3: 35%-60%
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Match the complex ions give in Column I with the colours given in column II and assign the correct code.
|
Column I (Complex ion) |
Column II (Colour) |
|
A. |
1. Violet |
|
B. |
2. Green |
|
C. |
3. Pale blue |
|
D. |
4. Yellowish orange |
Codes:
| Options: | A | B | C | D |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 3 | 1 | 5 | 2 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 3 | 2 | 1 |
Subtopic: VBT, CFT & their Limitations |
Level 3: 35%-60%
Hints
With the C–O bond in carbon monoxide being 1.128 Å, what would be the bond length in Fe(CO)₅?
| 1. | 1.15Å | 2. | 1.128Å |
| 3. | 1.13Å | 4. | 1.118Å |
Subtopic: VBT, CFT & their Limitations |
Level 3: 35%-60%
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In which of the following complexes, the central atom has \(sp^3\) hybridisation?
1. \([PtCl_4]^{2-}\)
2. \([Ni(CN)_4]^{2-}\)
3. \([Cu(NH_3)_4]^{2+}\)
4. None of the above.
1. \([PtCl_4]^{2-}\)
2. \([Ni(CN)_4]^{2-}\)
3. \([Cu(NH_3)_4]^{2+}\)
4. None of the above.
Subtopic: VBT, CFT & their Limitations |
Level 3: 35%-60%
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A pink-colored cobalt complex, denoted as (X), exists in aqueous solution. Upon reacting with concentrated HCl, it forms a deep blue-colored complex (Y). What are the identities of (X) and (Y), and what is the geometry of complex (Y), denoted as (Z)?
1. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{CoCl}_6\right]^{3-}, \text {Octahedral} \)
2. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+},\left[\mathrm{CoCl}_4\right]^{2-}, \text {Tetrahedral} \)
3. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{CoCl}_4\right]^{2-}, \text {Tetrahedral } \)
4. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+},\left[\mathrm{CoCl}_6\right]^{3-}, \text {Octahedral} \)
1. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{CoCl}_6\right]^{3-}, \text {Octahedral} \)
2. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+},\left[\mathrm{CoCl}_4\right]^{2-}, \text {Tetrahedral} \)
3. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{CoCl}_4\right]^{2-}, \text {Tetrahedral } \)
4. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+},\left[\mathrm{CoCl}_6\right]^{3-}, \text {Octahedral} \)
Subtopic: VBT, CFT & their Limitations |
Level 4: Below 35%
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Which of the following statements regarding the complex ion [Mn(CN)6]3- is correct?.
1. It is sp3d2 hybridised and octahedral.
2. It is d2sp3 hybridised and octahedral.
3. It is sp3d2 hybridised and tetrahedral.
4. It is dsp2 hybridised and square planar.
Subtopic: VBT, CFT & their Limitations |
Level 4: Below 35%
NEET - 2017
Hints
Which complex, among the following, has the highest value of crystal field splitting energy?
1. \([Co(CN)_6]^{3-}\)
2. \([Cu(NH_3)_4]^{2+}\)
3. \([Co(H_2O)_6]^{2+}\)
4. \([Ti(H_2O)_6]^{3+}\)
1. \([Co(CN)_6]^{3-}\)
2. \([Cu(NH_3)_4]^{2+}\)
3. \([Co(H_2O)_6]^{2+}\)
4. \([Ti(H_2O)_6]^{3+}\)
Subtopic: VBT, CFT & their Limitations |
Level 4: Below 35%
JEE
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