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Q. No.The order of stability of the following carbocations is:
 |
 |
 |
| (I) | (II) | (III) |
1. I > II > III
2. III > I > II
3. III > II > I
4. II > III > I
Subtopic: Electron Displacement Effects |
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Level 2: 60%+
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The correct order of decreasing stability of the following is:
\(\left(\mathrm{CH}_3\right)_3 \mathrm{C}^{-}, ^{-}\mathrm{CCl}_3,\left(\mathrm{CH}_3\right)_2 \mathrm{CH}^{-}, \mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}_2^{-}\)
| 1. | \({ }^{-} \mathrm{CCl}_3>\mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}_2^{-}>\left(\mathrm{CH}_3\right)_2 \mathrm{CH}^{-}>\left(\mathrm{CH}_3\right)_3 \mathrm{C}^{-} \) |
| 2. | \(\mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}_2^{-}>{ }^{-} \mathrm{CCl}_3>\left(\mathrm{CH}_3\right)_2 \mathrm{CH}^{-}>\left(\mathrm{CH}_3\right)_3 \mathrm{C}^{-} \) |
| 3. | \(\mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}_2^{-}>~^{-} \mathrm{CCl}_3>\left(\mathrm{CH}_3\right)_3 \mathrm{C}^{-}>\left(\mathrm{CH}_3\right)_2 \mathrm{CH}^{-} \) |
| 4. | None of the above |
Subtopic: Electron Displacement Effects |
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The increasing order of stability of the following free radicals is:
| 1. | \(\small{({CH}_3})_2 \dot{{C}}H<{({CH}_3})_3 \dot{{C}}<{({C}_6 {H}_5})_2 \dot{{C}}H <{({C}_6 {H}_5})_3 \dot{{C}}\) |
| 2. | \(\small({{C}_{6} {H}_{5})}_{3} \dot{{C}}<({{C}_{6} {H}_{5})}_{2} \dot{{C}} {H}<({{CH}_{3})}_{3} \dot{{C}}<({{CH}_{3})}_{2} \dot{{C}}H\) |
| 3. | \(\small({{C}_{6} {H}_{5})}_{2} \dot{{C}} {H}<({{C}_{6} {H}_{5})}_{3} \dot{{C}}<({{CH}_{3})}_{3} \dot{{C}} <({{CH}_{3})}_{2} \dot{{C}}H \) |
| 4. | \(\small({{CH}_{3})}_{2} \dot{{C}} {H}<({{CH}_{3})}_{3} \dot{{C}}<({{C}_{6} {H}_{5})}_{3} \dot{{C}} <({{C}_{6} {H}_{5})}_{2} \dot{{CH}}\) |
Subtopic: Electron Displacement Effects |
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Given the following benzyl/allyl system:
1. (CH3)3C- > (CH3)2CH- > CH3CH2-
2. CH3CH2- >(CH3)2CH- > (CH3)3C-
3. (CH3)2CH- > CH3CH2- > (CH3)3C-
4. (CH3)3C- > CH3CH2- > (CH3)2CH-
Subtopic: Electron Displacement Effects |
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The correct stability order of the resonating structure of the given compound is:
| A. |  |
| B. |  |
| C. |  |
| 1. | A > B > C | 2. | B > A > C |
| 3. | C > A > B | 4. | B > C > A |
Subtopic: Electron Displacement Effects |
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Level 3: 35%-60%
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What is the correct order of acidic strength for the following acids?\(\mathrm{{HCOOH}, \quad {CH}_3 {COOH}, \mathrm{CH}_3 {CH}_2 {COOH}},\\ \mathrm{{CH}_3 {CH}_2 {CH}_2 {COOH}}\)
| 1. | \(\mathrm{{HCOOH}<{CH}_3 {COOH}<{CH}_3 {CH}_2 {COOH}}< \\ \mathrm{{CH}_3 {CH}_2 {CH}_2 {COOH}} \) |
| 2. | \(\mathrm{{HCOOH}>{CH}_3 {CH}_2 {CH}_2 {COOH}>{CH}_3 {COOH}}> \\ \mathrm{{CH}_3 {CH}_2 {COOH}}\) |
| 3. | \(\mathrm{{HCOOH}>{CH}_3 {COOH}>{CH}_3 {CH}_2 {COOH}}> \\ \mathrm{{CH}_3 {CH}_2 {CH}_2 {COOH}}\) |
| 4. | \(\mathrm{{CH}_3 {COOH}>{HCOOH}>{CH}_3 {CH}_2 {CH}_2 {COOH}}> \\ \mathrm{{CH}_3 {CH}_2 {COOH}}\) |
Subtopic: Electron Displacement Effects |
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Arrange the following in increasing order of their stability:
1. (a) < (b) < (c) < (d)
2. (a) < (d) < (c) < (b)
3. (a) < (c) < (d) < (b)
4. (d) < (c) < (a) < (b)
| a. |  |
b. |  |
| c. |  |
d. |  |
1. (a) < (b) < (c) < (d)
2. (a) < (d) < (c) < (b)
3. (a) < (c) < (d) < (b)
4. (d) < (c) < (a) < (b)
Subtopic: Electron Displacement Effects |
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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 |
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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 |
56%
Level 3: 35%-60%
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Subtopic: Electron Displacement Effects | Reaction Intermediates ; Preparation & Properties |
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Level 3: 35%-60%
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