An alkene "A" on reaction with O3 and Zn-H2O gives propanone and ethanal in equimolar ratio. The addition of HCl to alkene "A" gives "B" as the major product. The structure of product "B" is:

1. 2.
3. 4.

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
 74%
From NCERT
NEET - 2019
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The most suitable reagent for the following conversion is-

1.  Hg2+/ H+, H2O

2. Na/liquid NH3

3. H2, Pd/C, quinoline

4. Zn/HCl

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
 78%
From NCERT
NEET - 2019
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The reaction among the following that proceeds through an electrophilic substitution reaction is:

1.
2.
3.
4.
Subtopic:  Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
 66%
From NCERT
NEET - 2019
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The alkane that gives only one monochloro product on chlorination with Cl2 in presence of diffused sunlight is-

1. 2,2,-dimethylbutane 2. neopentane
3. n-pentane 4. Isopentane
Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 68%
From NCERT
NEET - 2019
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In the following reaction,

\( CH_{3}C\equiv CH\xrightarrow[Red \ hot \ iron \ tube]{873 K} \ A\)

The number of (σ) bonds present in the product (A) is:

1. 21 

2. 9

3. 24

4. 18

Subtopic:  Aromatic Hydrocarbons - Benzene - Structure, Preparation & Chemical Reactions |
 51%
From NCERT
NEET - 2019
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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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Which of the following alkane cannot be made in good yield by Wurtz reaction?

1. 2,3-Dimethylbutane 2. n-Heptane
3. n-Butane 4. n-Hexane
Subtopic:  Aliphatic Hydrocarbon - Methods of Preparation |
 75%
From NCERT
NEET - 2020
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An alkene on ozonolysis gives methanal as one of the products. Its structure is:

1. 2.
3. 4.
Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
 84%
From NCERT
NEET - 2020
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Which of the following is a free radical substitution reaction?

1. Benzene with Br2/AlCl3

2. Acetylene with HBr

3. Methane with Br2/hv

4. Propene with HBr/(C6H5COO)2

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism | Alkanes, Alkenes and Alkynes - Chemical Properties |
 76%
From NCERT
NEET - 2020
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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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