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Q. No.Consider the following compounds/species:
i.
ii.
iii.
iv.
v
vi
vii
The number of compounds/species which obey Huckel's rule is:
1.
5
2.
4
3.
6
4.
2
Subtopic: Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
73%
Level 2: 60%+
NEET - 2023
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Given below are two statements:
| Assertion (A): | Eclipsed and staggered are two conformations of ethane. |
| Reason (R): | In all the conformations, the bond angles and bond lengths change. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
71%
Level 2: 60%+
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Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
Level 3: 35%-60%
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Given below are two statements:
| Statement I: | The rate of reaction of alkanes with halogens in the presence of light is I2 > Br2 > Cl2 > F2 |
| Statement II: | Iodination of an alkane is carried out in the presence of oxidizing agents like HlO3 or HNO3 |
| 1. | Both Statement I and Statement II are correct. |
| 2. | Both Statement I and Statement II are incorrect. |
| 3. | Statement I is correct but Statement II is incorrect. |
| 4. | Statement I is incorrect but Statement II is correct. |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
60%
Level 2: 60%+
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In the presence of sunlight, benzene reacts with \(Cl_2\) to give product 'X'. The number of hydrogens in 'X' is:
1. Five (5)
2. Three (3)
3. Six (6)
4. Twelve (12)
1. Five (5)
2. Three (3)
3. Six (6)
4. Twelve (12)
Subtopic: Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
68%
Level 2: 60%+
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Which of the following is correct statement?
| 1. | Cis-but-2-ene has a higher boiling point than Trans-but-2-ene. |
| 2. | Cis-but-2-ene has a lower boiling point than Trans-but-2-ene. |
| 3. | Cis-but-2-ene has a lower dipole moment than Trans-but-2-ene. |
| 4. | Cis-but-2-ene is non-polar. |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
67%
Level 2: 60%+
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Consider the following sequence of reactions and select the correct option for the product:
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
87%
Level 1: 80%+
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Which of the following molecules contains 1°, 2°, and 3° carbon atoms?
1. 2,3,4-Trimethylpentane
2. Chlorocyclohexane
3. 1,1-Dimethylcyclohexane
4. Methylcyclohexane
1. 2,3,4-Trimethylpentane
2. Chlorocyclohexane
3. 1,1-Dimethylcyclohexane
4. Methylcyclohexane
Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
60%
Level 2: 60%+
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Given below are two statements:
| Assertion (A): | Alkenes and series of cycloalkanes of hydrocarbons have the same general formula. |
| Reason (R): | Either insertion of a double bond or formation of a ring reduces the number of hydrogen atoms of the corresponding alkane by 2. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
79%
Level 2: 60%+
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Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
84%
Level 1: 80%+
JEE
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