- 1(current)
Q. No.Given below are two statements:
| Assertion (A): | [NiCl4]2− is paramagnetic while [Ni(CO)4] is diamagnetic though both are tetrahedral. |
| Reason (R): | CO is a strong field ligand, thus pairing of electrons takes place in [Ni(CO)4]. |
| 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. |
Assertion: ion shows magnetic moment corresponding to two unpaired electrons.
Reason: Because it has type hybridization.
1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true and the reason is not the correct explanation of assertion.
3. Assertion is true but the reason is false.
4. Assertion is false but the reason is true.
Assertion (A): and are reducing in nature.
Reason (R): Unpaired electrons are present in their d-orbitals.
1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true and reason is not the correct explanation of assertion.
3. Assertion is true but the reason is false.
4. Assertion is false but reason is true.
| a. | The hexaquamanganese(II) ion contains five unpaired electrons, while the hexacyanomanganese(II) ion contains only one unpaired electron. |
| b. | [Mn(H2O)6]2+ is an outer sphere complex, and [Mn(CN)6]4− is an inner sphere complex. |
| c. | Arrangement of the electrons in [Mn(CN)6]4− is t2g5eg0. |
The correct statement(s) is/are
1. a, b only
2. b, c only
3. a, b, c
4. None of the above
| I: | [Fe(H2O)6]3+ is strongly paramagnetic whereas [Fe(CN)6]3− is weakly paramagnetic. |
| II: | [Fe(H2O)6]3+ has 4 unpaired electrons while [Fe(CN)6]3− has 5 unpaired electrons. |
1. Both I and II are true.
2. I is true and II is false.
3. Both I and II are false.
4. I is false but II is true.
| Statement I: | [Ni(CN)4]2− structure is tetrahedral and diamagnetic in nature. |
| Statement II: | [NiCl4]2− structure is tetrahedral and diamagnetic in nature. |
1. Both Statement I and II are true.
2. Statement I is true and statement II is false.
3. Both Statement I and II are false.
4. Statement I is false, Statement II is true.
The correct statements among the following are:
| (I) | Valence bond theory cannot explain the color exhibited by transition metal complexes. |
| (II) | Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes. |
| (III) | Valence bond theory cannot distinguish ligands as weak and strong field ones. |
1. (I), (II), and (III)
2. (II), and (III) only
3. (I), and (II) only
4. (I), and (III) only
Match the complex ions given in Column I with the hybridization and number of unpaired electrons given in Column II and assign the correct code.
| Column l |
Column II (Hybridisation, number of unpaired electrons) |
|
A. |
1. dsp2, 1 |
|
B. |
2. sp3d2, 5 |
|
C. |
3. d2sp3, 3 |
|
D. |
4. sp3d2, 2 |
Codes
| Options: | A | B | C | D |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 3 | 1 | 4 | 2 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 3 | 2 |
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 |
- 1(current)
Q. No.
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