The compound with an isopropyl group is:

1. 2,2,3,3-Tetramethylpentane

2. 2,2-Dimethylpentane

3. 2,2,3-Trimethylpentane

4. 2-Methylpentane

Subtopic:  Nomenclature |
 68%
Level 2: 60%+
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The compounds that show geometrical isomerism among the following are:

a. 2-Butene

b. Propene

c. 1-Phenylpropene

d. 2-Methylbut-2-ene

1. a, b

2. c, d

3. a, b, c

4. a, c

Subtopic:  Stereo Isomers |
 73%
Level 2: 60%+
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Arrange the following groups in the decreasing order of -I (inductive) effect:
\(\mathrm{NO}_2, \mathrm{C}\left(\mathrm{CH}_3\right)_3, \mathrm{CH}_3, \mathrm{OCH}_3, \mathrm{Br}\)
1. \(\mathrm{NO}_2>\mathrm{Br}>\mathrm{OCH}_3>\mathrm{C}\left(\mathrm{CH}_3\right)_3>\mathrm{CH}_3\)
2. \(\mathrm{NO}_2>\mathrm{Br}>\mathrm{OCH}_3>\mathrm{CH}_3>\mathrm{C}\left(\mathrm{CH}_3\right)_3\)
3. \(\mathrm{NO}_2>\mathrm{OCH}_3>\mathrm{Br}>\mathrm{C}\left(\mathrm{CH}_3\right)_3>\mathrm{CH}_3\)
4. \(\mathrm{NO}_2>\mathrm{OCH}_3>\mathrm{C}\left(\mathrm{CH}_3\right)_3>\mathrm{Br}>\mathrm{CH}_3\)
Subtopic:  Electron Displacement Effects |
 73%
Level 2: 60%+
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The most stable carbocation among the following is:

1. \(({CH_3})_3C\overset{+}{C}HCH_3\) 2. \({CH_3}CH_2\overset{+}{C}HCH_2CH_3\)
3. \(({CH_3})_2\overset{+}{C}CH_2CH_2CH_3\) 4. \({CH_3}CH_2\overset{+}{C}H_2\)
Subtopic:  Electron Displacement Effects |
 79%
Level 2: 60%+
NEET - 2019
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The compound that is most difficult to protonate is:

1. 2.
3. 4.
Subtopic:  Acidic & Basic Character |
 64%
Level 2: 60%+
NEET - 2019
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Paper chromatography is an example of-

1. Partition chromatography

2. Thin layer chromatography

3. Column chromatography

4. Adsorption chromatography

Subtopic:  Purification of Organic Compounds |
 74%
Level 2: 60%+
NEET - 2020
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A liquid compound (X) can be purified by steam distillation only if it is:

1. Steam volatile, immiscible with water.

2. Not steam volatile, miscible with water.

3. Steam volatile, miscible with water.

4. Not steam volatile, immiscible with water.

Subtopic:  Purification of Organic Compounds |
 84%
Level 1: 80%+
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The Cl — C — Cl angles in 1,1,2,2-tetrachloroethene and tetrachloromethane will be about :

1. 120° and 109.5°

2. 90° and 109.5°

3. 109.5° and 90°

4. 109.5° and 120°

Subtopic:  Hybridisation & Structure of Carbon Compounds |
 64%
Level 2: 60%+
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Identify the maximum number of carbon atoms that can be connected in a linear arrangement within the molecule CH₃–C≡C–CH=CH₂.

1. 3

2. 4

3. 5

4. 6

Subtopic:  Hybridisation & Structure of Carbon Compounds |
 52%
Level 3: 35%-60%
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Which of the following is an isomer of ethanol?

1. Methanol 2. Diethyl ether
3. Acetone 4. Dimethyl ether
Subtopic:  Structural Isomers |
 72%
Level 2: 60%+
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