Aldehyde and Ketones (Nature of Carbonyl Group, Nucleophilic Addition to >C=O group,...) NEET Questions

Organic Chemistry - Organic Compounds Containing Oxygen

Aldehyde and Ketones (Nature of Carbonyl Group, Nucleophilic Addition to >C=O group,...) MCQ Questions


1.
Which compound gives a positive iodoform test?

NEET - 2022

A.
Acetaldehyde
B.
Benzaldehyde
C.
Formaldehyde
D.
Propionaldehyde
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ANSWER :
A. Acetaldehyde
2.
Which reagent is used in the Clemmensen reduction?
A.
Zn/HCl
B.
LiAlHâ‚„
C.
Hâ‚‚/Ni
D.
Tollen's reagent
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ANSWER :
A. Zn/HCl
3.
Which of the following compounds will not undergo aldol condensation?
A.
Ethanol
B.
Acetone
C.
Acetaldehyde
D.
Propanone
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ANSWER :
A. Ethanol
4.
Which product is formed when benzaldehyde is treated with Tollen’s reagent?

NEET - 2019

A.
Benzyl alcohol
B.
Benzoic acid
C.
Benzene
D.
Benzoate ion
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ANSWER :
B. Benzoic acid
5.
Which is more reactive in nucleophilic addition: aldehyde or ketone?
A.
Aldehyde
B.
Ketone
C.
Both equally
D.
None
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ANSWER :
A. Aldehyde
6.
Which of these is a test for aldehydes only?
A.
Tollen’s test
B.
Brady’s test
C.
Lucas test
D.
Iodoform test
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ANSWER :
A. Tollen’s test