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 |
 67%
From NCERT
NEET - 2023
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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    
Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
 57%
From NCERT
NEET - 2023
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Which of the following compounds does not exhibit aromaticity?
 
1. 2.
3. 4.
Subtopic:  Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
 72%
From NCERT
NEET - 2022
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Compound X on reaction with \(O_3\) followed by \(Zn/ H_2O\)gives formaldehyde and 2-methyl propanal as products. The compound X is : 
1. Pent-2-ene 
2. 3-Methylbut-1-ene 
3. 2-Methylbut-1-ene 
4. 2-Methylbut-2-ene 
Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 71%
From NCERT
NEET - 2022
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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 |
 80%
From NCERT
NEET - 2022
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The compound obtained by addition of water to an alkyne having more than two carbons, in the presence of \(HgSO_4 \) and dilute \(H_2SO_4\) at 333K, is:

1. A vicinal diol 2. An aldehyde
3. An alcohol 4. A ketone
Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 59%
From NCERT
NEET - 2022
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Given the following compounds:
(a) Heptane
(b) Butane
(c) 2-Methylbutane
(d) 2-Methylpropane
(e) Hexane
For the compounds given above, the correct option capturing decreasing order of boiling points is:
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 |
 51%
From NCERT
NEET - 2022
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The dihedral angle of the least stable conformer of ethane is:

1. 60° 2.
3. 120° 4. 180°
Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
 66%
From NCERT
NEET - 2021
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The major product of the following chemical reaction is:

1.
2.
3.
4.
Subtopic:  Aliphatic Hydrocarbon - Methods of Preparation |
 69%
From NCERT
NEET - 2021
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Which of the following statement(s) is/are correct about the elimination reaction of 2-Bromopentane to form pent-2-ene:
a. β-Elimination reaction
b. Follows Zaitsev rule
c. Dehydrohalogenation reaction
d. Dehydration reaction

1. (a), (c), (d) 2. (b), (c), (d)
3. (a), (b), (d) 4. (a), (b), (c)

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism | Aliphatic Hydrocarbon - Methods of Preparation |
 75%
From NCERT
NEET - 2020
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