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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Reactivity of chlorine and bromine towards methane at 275°C differs by a factor nearly

1. 103

2. 104

3. 102

4. >105

Subtopic:  Aliphatic Hydrocarbon- Physical Properties |
From NCERT
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An organic molecule necessarily shows optical activity if it -

1. Contains asymmetric carbon atoms

2. Is non-planar

3. Is non-superimposable on its mirror image

4. Is superimposable on its mirror image

Subtopic:  Alkanes, Alkenes and Alkynes - Conformations and Hybridisation |
 66%
From NCERT
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Acetylene and HCHO reaction to the presence of copper acetylide catalyst to form

1. 2-Butyne-1,4-diol

2. But-2-yne-1,2-diol

3. But-1-yne-1,4-diol

4. None of these

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 52%
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On the addition of HBr to propene in the absence of
peroxides,the first step involves the addition of

(1) H+

(2) Br-

(3) H

(4) Br

Subtopic:  Aliphatic Hydrocarbon -Nomenclature, Isomerism & Mechanism |
 73%
From NCERT
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When ethyl bromide and n-propyl bromide is allowed
to react with sodium, in ether, they form

(1) mixture of four alkanes

(2) mixture of three alkanes

(3) mixture of two alkanes

(4) single alkane

Subtopic:  Aliphatic Hydrocarbon - Methods of Preparation |
 76%
From NCERT
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The compound that has least hindered rotation around carbon-carbon bond is-

1. Ethane 2. Ethylene
3. Acetylene 4. Hexachloroethane
Subtopic:  Alkanes, Alkenes and Alkynes - Conformations and Hybridisation |
 71%
From NCERT
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A compound having the highest boiling point among the following is - 

1. Iso-octane 2. n-Octane
3. 2,2,3,3-Tetramethyl butane 4. n-Butane
Subtopic:  Aliphatic Hydrocarbon- Physical Properties |
 80%
From NCERT
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 [A] and [B]  in the  mentioned reaction are respectively -

1. Alc. KOH and NaNH2

2. NaNH2 and Lindlar catalyst

3. NaNH2 and alcoholic KOH

4. Lindlar catalyst and NaNH2

Subtopic:  Alkanes, Alkenes and Alkynes - Chemical Properties |
From NCERT
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