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Which of the following alkanes will give the maximum number of isomers when a monochloro-substituted product is obtained?
| 1. |  |
2. |  |
| 3. | \(\mathrm{CH_4}\) |
4. |  |
Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
Level 3: 35%-60%
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What is the minimum number of carbon atoms required for an alkane to have isomers?
1. One
2. Two
3. Four
4. Three
Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
Level 3: 35%-60%
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Among the following, the compound which contains the fewest tertiary carbons is:
| 1. | \((CH_3)_3C(CH_2)_2CH_3~~~~~~~~~~~~~\) |
| 2. | 4-isobutyl heptane |
| 3. |  |
| 4. |  |
Subtopic: Aliphatic Hydrocarbon- Physical Properties |
Level 3: 35%-60%
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The correct statement(s) among the following is/are:
1. (B) only
2. (C) only
3. (B) and (C) only
4. (A), (B), and (C)
| (A) | The boiling point of 2-methylbutane is greater than n-pentane. |
| (B) | Petrol and lower fractions of petroleum are used for dry cleaning of clothes to remove grease stains. |
| (C) | The melting point of 2,2-Dimethylpropane is greater than n-pentane. |
1. (B) only
2. (C) only
3. (B) and (C) only
4. (A), (B), and (C)
Subtopic: Aliphatic Hydrocarbon- Physical Properties |
Level 3: 35%-60%
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Find out the correct statement:
1. Only B is correct.
2. A and C.
3. B and C.
4. Only A is correct.
| A. | The number of possible theoretical conformations of ethane is 6. |
| B. | In the conformations of ethane, the staggered form has the least torsional strain, and the eclipsed form has the maximum torsional strain. |
| C. | Hückel Rule: The presence of (4n + 2) π electrons in the ring where n is an integer (n = 1, 2, ......). |
2. A and C.
3. B and C.
4. Only A is correct.
Subtopic: Aliphatic Hydrocarbon- Physical Properties | Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
Level 4: Below 35%
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Cyclohexene on ozonolysis by reaction with zinc dust and water gives compound E. Compound E on further treatment with aqueous \(KOH\) yields compound F. Compound F is:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Aliphatic Hydrocarbon - Methods of Preparation |
Level 3: 35%-60%
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Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
52%
Level 3: 35%-60%
NEET - 2016
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Which of the following reactions gives a meso-compound as the main product?
1. a, b
2. b, c
3. c, d
4. None of the above
| a. |  |
| b. |  |
| c. |  |
| d. |  |
1. a, b
2. b, c
3. c, d
4. None of the above
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 3: 35%-60%
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What specific reagents are used to convert dibromoethane into benzene?
1. (a) NaOH; (b) NaNH2; (c) Red hot iron tube at 873 K
2. (a) HBr; (b) NaNH2 ; (c) KMnO4
3. (a) alc.KOH; (b) NaNH2 ; (c) H2/Pd
4. None of the above
1. (a) NaOH; (b) NaNH2; (c) Red hot iron tube at 873 K
2. (a) HBr; (b) NaNH2 ; (c) KMnO4
3. (a) alc.KOH; (b) NaNH2 ; (c) H2/Pd
4. None of the above
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 4: Below 35%
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Subtopic: Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
Level 4: Below 35%
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