Q. No.What is the correct order of stability for the given carbanions?
1. a > b > c > d > e
2. b > e > d > a > c
3. a > c > d > e > b
4. b > e > d > c > a
| (a) |  |
| (b) |  |
| (c) |  |
| (d) |  |
| (e) |  |
1. a > b > c > d > e
2. b > e > d > a > c
3. a > c > d > e > b
4. b > e > d > c > a
Subtopic: Electron Displacement Effects | Reaction Intermediates ; Preparation & Properties |
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Level 1: 80%+
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Consider the two structures:
Read the following statements:
(A) Q has more \(\boldsymbol{\delta}^-\) on chlorine than P.
(B) Q has more dipole moment than P.
(C) In Q, C-CI bond has double bond character.
(D) In Q, CI is attached to \(sp^2\) hybridised carbon but in P, CI is attached to \(sp^3\).
(E) In Q, C-CI bond length is more due to repulsion between lone pair on chlorine and \(\pi ~e^-\) in aromatic ring.
The correct options is:
1. A, B, D, E
2. C, D
3. B, C, D
4. B, C, D, E
Read the following statements:
(A) Q has more \(\boldsymbol{\delta}^-\) on chlorine than P.
(B) Q has more dipole moment than P.
(C) In Q, C-CI bond has double bond character.
(D) In Q, CI is attached to \(sp^2\) hybridised carbon but in P, CI is attached to \(sp^3\).
(E) In Q, C-CI bond length is more due to repulsion between lone pair on chlorine and \(\pi ~e^-\) in aromatic ring.
The correct options is:
1. A, B, D, E
2. C, D
3. B, C, D
4. B, C, D, E
Subtopic: Hybridisation & Structure of Carbon Compounds | Aromaticity & Polarity | Electron Displacement Effects |
57%
Level 3: 35%-60%
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Consider the following two compounds:
Statement-I : B is more stable due to \(9\alpha H\)
Statement-II : A is less stable due to \(3\alpha H\)
1. Statement-I and Statement-II both are correct
2. Statement-I is incorrect, Statement-II is correct
3. Statement-I is correct, Statement-II is incorrect
4. Statement-I and Statement-II both incorrect
Statement-I : B is more stable due to \(9\alpha H\)
Statement-II : A is less stable due to \(3\alpha H\)
1. Statement-I and Statement-II both are correct
2. Statement-I is incorrect, Statement-II is correct
3. Statement-I is correct, Statement-II is incorrect
4. Statement-I and Statement-II both incorrect
Subtopic: Bond Cleavage & Isomerism | Electron Displacement Effects | Reaction Intermediates ; Preparation & Properties |
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Level 2: 60%+
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Compare the rate of nitration in decreasing order :
1. A > B > C
2. A > C > B
3. B > A > C
4. C > A > B
1. A > B > C
2. A > C > B
3. B > A > C
4. C > A > B
Subtopic: Aromaticity & Polarity | Electron Displacement Effects |
81%
Level 1: 80%+
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Subtopic: Electron Displacement Effects | Reaction Intermediates ; Preparation & Properties |
53%
Level 3: 35%-60%
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The correct arrangement of the following carbocations in decreasing order of their stability is:
1. A > B > C > D
2. B > C > A > D
3. C > B > A > D
4. C > A > B > D
Subtopic: Electron Displacement Effects |
57%
Level 3: 35%-60%
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Identify correct statement(s):
Choose the correct answer from the options given below :
1. (A), (C) and (D) only
2. (A), (B) and (E) only
3. (A) only
4. (A) and (C) only
| (A) | —OCH3 and —NHCOCH3 are activating groups. |
| (B) | —CN and —OH are meta-directing groups. |
| (C) | —CN and —SO3H are meta-directing groups. |
| (D) | Activating groups act as ortho – and para-directing groups. |
| (E) | Halides are activating groups. |
Choose the correct answer from the options given below :
1. (A), (C) and (D) only
2. (A), (B) and (E) only
3. (A) only
4. (A) and (C) only
Subtopic: Electron Displacement Effects |
82%
Level 1: 80%+
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Arrange the following carbocations in increasing order of their stability:
1. I < II < IV < III
2. II < III < IV < I
3. II < I < III < IV
4. III < IV < II < I
| (I) |  |
| (II) |  |
| (III) |  |
| (IV) |  |
1. I < II < IV < III
2. II < III < IV < I
3. II < I < III < IV
4. III < IV < II < I
Subtopic: Electron Displacement Effects |
96%
Level 1: 80%+
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Match the following:
1. (i) → (b), (ii) → (a), (iii) → (c), (iv) → (d)
2. (i) → (a), (ii) → (b), (iii) → (c), (iv) → (d)
3. (i) → (c), (ii) → (b), (iii) → (a), (iv) → (d)
4. (i) → (d), (ii) → (c), (iii) → (a), (iv) → (b)
| Column-I | Column-II | ||
| (i) | Nitrobenzene | (a) | +R |
| (ii) | Aniline | (b) | -R |
| (iii) |  |
(c) | +E |
| (iv) |  |
(d) | -E |
1. (i) → (b), (ii) → (a), (iii) → (c), (iv) → (d)
2. (i) → (a), (ii) → (b), (iii) → (c), (iv) → (d)
3. (i) → (c), (ii) → (b), (iii) → (a), (iv) → (d)
4. (i) → (d), (ii) → (c), (iii) → (a), (iv) → (b)
Subtopic: Electron Displacement Effects |
80%
Level 1: 80%+
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Arrange the following anions in the decreasing order of their stability:
| 1. | I > II > III > IV | 2. | IV > III > II > I |
| 3. | III > II > I > IV | 4. | II > IV > III > I |
Subtopic: Electron Displacement Effects |
78%
Level 2: 60%+
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