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


7.
Which compound reacts with NaHSO₃ to form a crystalline solid?
A.
Formaldehyde
B.
Benzoic acid
C.
Phenol
D.
Ethanoic acid
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ANSWER :
A. Formaldehyde
8.
Why are ketones less reactive than aldehydes?
A.
Steric hindrance
B.
Resonance stabilization
C.
Inductive effect
D.
All of the above
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ANSWER :
D. All of the above
9.
Grignard reagent reacts with formaldehyde to give:
A.
Primary alcohol
B.
Secondary alcohol
C.
Tertiary alcohol
D.
Aldehyde
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ANSWER :
A. Primary alcohol
10.
Cleavage of C=O double bond in aldehyde is a:
A.
Reduction
B.
Condensation
C.
Oxidation
D.
Dehydration
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ANSWER :
A. Reduction
11.
The product of reaction between acetone and HCN is:
A.
Cyanohydrin
B.
Alcohol
C.
Alkene
D.
Ether
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ANSWER :
A. Cyanohydrin
12.
In Cannizzaro reaction, one molecule is oxidized and the other is:
A.
Reduced
B.
Isomerized
C.
Dehydrated
D.
Condensed
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ANSWER :
A. Reduced