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Q. No.The electron pair in the \(\pi -\) bond of an alkene has:
1.
33% p character and are at a lower energy level than the electron pair in the \(\sigma -\) bond.
2.
50% p character and are at a higher energy level than the electron pair in the \(\sigma -\) bond.
3.
100% p character and are at a lower energy level than the electron pair in the \(\sigma -\) bond.
4.
100% p character and are at a higher energy level than the electron pair in the \(\sigma -\) bond.
Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
From NCERT
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When dealing with hybridization in organic compounds, which bond angle is associated with the strongest bond formation?
1. 109°
2. 120°
3. 180°
4. 360°
1. 109°
2. 120°
3. 180°
4. 360°
Subtopic: Aliphatic Hydrocarbon- Physical Properties |
69%
From NCERT
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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 |
From NCERT
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Anthracene is an aromatic compound that is described by the following characteristics:
| I. | Cyclic |
| II. | Planar |
| III. | Satisfies Huckel's rule |
| IV. | Has an even number of \(\pi\) electrons |
| 1. | I and II only | 2. | II, III, and IV only |
| 3. | I, III, and IV only | 4. | I, II, III, and IV |
Subtopic: Aromatic Hydrocarbons - Reactions & Mechanism |
78%
From NCERT
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The correct IUPAC name for this non-polar alkane is:
1. 3-Ethyl-4-methylheptane
2. 3-Ethyl-4, 7-dimethynonane
3. 3-Methyl-7-ethydecane
4. 3,4-Diethyl-5, 7-dimethylnonane
1. 3-Ethyl-4-methylheptane
2. 3-Ethyl-4, 7-dimethynonane
3. 3-Methyl-7-ethydecane
4. 3,4-Diethyl-5, 7-dimethylnonane
Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
89%
From NCERT
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Which amongst the following compounds will show geometrical isomerism?
1. Pent-1-ene
2. 2,3-Dimethylbut-2-ene
3. 2-Methylprop-1-ene
4. 3,4-Dimethylhex-3-ene
1. Pent-1-ene
2. 2,3-Dimethylbut-2-ene
3. 2-Methylprop-1-ene
4. 3,4-Dimethylhex-3-ene
Subtopic: Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
59%
From NCERT
NEET - 2023
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Consider the following compounds/species:
The number of compounds/species which obey Huckel's rule is:
| i. |  |
ii. |  |
| iii. |  |
iv. |  |
| v |  |
vi |  |
| vii |  |
| 1. | 5 | 2. | 4 |
| 3. | 6 | 4. | 2 |
Subtopic: Aromatic Hydrocarbons - Nomenclature, Isomerism & Huckel's Rule |
71%
From NCERT
NEET - 2023
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What is the correct order of boiling points for the following compounds, arranged from the highest to the lowest?
(a) Heptane
(b) Butane
(c) 2-Methylbutane
(d) 2-Methylpropane
(e) Hexane
Choose the correct option from the following:
(a) Heptane
(b) Butane
(c) 2-Methylbutane
(d) 2-Methylpropane
(e) Hexane
Choose the correct option from the following:
| 1. | (a) > (c) > (e) > (d) > (b) | 2. | (c) > (d) > (a) > (e) > (b) |
| 3. | (a) > (e) > (b) > (c) > (d) | 4. | (a) > (e) > (c) > (b) > (d) |
Subtopic: Aliphatic Hydrocarbon- Physical Properties |
52%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
The compound obtained by addition of water to an alkyne having more than two carbons, in the presence of \(\mathrm{HgSO_4 }\) and dilute \(\mathrm{H_2SO_4}\) at 333K, is:
1. A vicinal diol
2. An aldehyde
3. An alcohol
4. A ketone
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
60%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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Match the bond line structures of hydrocarbons given in List I with the corresponding boiling points given in List II.
| List-I (Compound) | List II (Boiling point in K) | ||
| (a) |  |
(i) | 300.9 |
| (b) |  |
(ii) | 282.5 |
| (c) |  |
(iii) | 309.1 |
| (d) |  |
(iv) | 341.9 |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iv) | (iii) | (ii) |
| 2. | (iii) | (i) | (iv) | (ii) |
| 3. | (iii) | (iv) | (i) | (ii) |
| 4. | (iv) | (i) | (ii) | (iii) |
Subtopic: Aliphatic Hydrocarbon- Physical Properties |
82%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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