The number of bridging carbonyl groups in [Co2(CO)8] and [Mn2(CO)10], respectively are:
| 1. | 2 and 0 | 2. | 2 and 2 |
| 3. | 2 and 4 | 4. | 0 and 2 |
Subtopic: Organometallic Complexes & their Uses |
63%
Level 2: 60%+
NEET - 2022
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Which of the following is not a polydentate ligand?
1. Oxalate
2. Ethylenediamine
3. Thiocyanate
4. EDTA
1. Oxalate
2. Ethylenediamine
3. Thiocyanate
4. EDTA
Subtopic: Ligands |
66%
Level 2: 60%+
Please attempt this question first.
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Please attempt this question first.
For the reaction, 2A → B, rates= k[A]2. If the concentration of reactant is doubled, then the:
| (a) | rate of reaction will be doubled. |
| (b) | rate constant will remain unchanged, however rate of reaction is directly proportional to the rate constant. |
| (c) | rate constant will change since the rate of reaction and rate constant are directly proportional to each other. |
| (d) | rate of reaction will increase by four times. |
Identify the set of correct statements & choose the correct answer from the options given below:
| 1. | (a) and (c) only | 2. | (a) and (b) only |
| 3. | (b) and (d) only | 4. | (c) and (d) only |
Subtopic: Definition, Rate Constant, Rate Law |
69%
Level 2: 60%+
NEET - 2022
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Match Compound/element in Column-I with uses in Column-II and select the best match from the codes given:
| Column-I (Compound/element) |
Column-II (Uses) |
||
| A. | Lanthanoid oxide | I. | Petroleum cracking |
| B. | Lanthanoid | II. | Television screen |
| C. | Mischmetal | III. | Lanthanoid metal + iron |
| D. | Mixed oxides of lanthanoids are employed | IV. | Production of iron alloy |
| Options: | A | B | C | D |
| 1. | II | I | IV | III |
| 2. | I | II | III | IV |
| 3. | II | IV | III | I |
| 4. | IV | I | III | II |
Subtopic: Lanthanoid & Actinoids Contraction |
56%
Level 3: 35%-60%
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Which of the following is the correct statement?
1. Ga+ is more stable than ln+.
2. Al+ is more stable than ln+.
3. Ga+ is more stable than Al+.
4. Al+ is more stable than Ga+.
Subtopic: Boron Family- Preparations, Properties & Uses |
81%
Level 1: 80%+
NEET - 2022
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What is the correct increasing order of ionic radii for the ions Ce³⁺, La³⁺, Pm³⁺, and Yb³⁺?
1. Yb3+ <Pm3+ <Ce3+ <La3+
2. Ce3+ <Yb3+ <Pm3+ <La3+
3. Yb3+ <Pm3+ <La3+ <Ce3+
4. Pm3+ <La3+ <Ce3+ <Yb3+
1. Yb3+ <Pm3+ <Ce3+ <La3+
2. Ce3+ <Yb3+ <Pm3+ <La3+
3. Yb3+ <Pm3+ <La3+ <Ce3+
4. Pm3+ <La3+ <Ce3+ <Yb3+
Subtopic: Lanthanoid & Actinoids Contraction |
77%
Level 2: 60%+
Please attempt this question first.
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Please attempt this question first.
One mole of sugar is dissolved in three moles of water at 298 K. The relative lowering of vapour pressure is:
| 1. | 0.25 | 2. | 0.15 |
| 3. | 0.50 | 4. | 0.33 |
Subtopic: Relative Lowering of Vapour Pressure |
76%
Level 2: 60%+
NEET - 2022
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Subtopic: Carbohydrates - Classification & D-L configuration |
70%
Level 2: 60%+
NEET - 2022
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Match list-I with list-II:
| List-I (Amines) | List-II (pKb values) | ||
| (a) | N-Methylmethanamine | (i) | 9.30 |
| (b) | Ammonia | (ii) | 9.38 |
| (c) | N-Methylaniline | (iii) | 4.75 |
| (d) | Benzenamine | (iv) | 3.27 |
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (ii) | (i) | (iii) |
| 2. | (iv) | (iii) | (i) | (ii) |
| 3. | (iii) | (iv) | (i) | (ii) |
| 4. | (i) | (iv) | (iii) | (ii) |
Subtopic: Amines - Preparation & Properties |
71%
Level 2: 60%+
NEET - 2022
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Given below are two statements:
| I: | The product of the reaction of phenol with bromine depends on the nature of the solvent. |
| II: | The reaction of phenol with bromine in CHCl3 gives a monosubstituted bromo derivative whereas the reaction of phenol with bromine water yields a trisubstituted bromo derivative of phenol. |
| 1. | I is correct and II is incorrect |
| 2. | I is incorrect and II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Electrophilic Substitution Reactions, Uses of Phenols |
86%
Level 1: 80%+
NEET - 2022
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