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.
The hybridisation of the carbon atom in the carbonyl group (>C=O) is:
A.
sp
B.
sp³
C.
sp³d
D.
sp²
😑 View Answer Rough Work Error
ANSWER :
D. sp²
2.
The bond angle around the carbonyl carbon in aldehydes and ketones is approximately:
A.
90°
B.
180°
C.
120°
D.
109.5°
😑 View Answer Rough Work Error
ANSWER :
C. 120°
3.
In the carbonyl group, the carbon atom is:
A.
Nucleophilic centre
B.
Electrophilic centre
C.
Neutral centre
D.
Free radical centre
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ANSWER :
B. Electrophilic centre
4.
The carbonyl group has substantial dipole moment because:
A.
Oxygen is more electronegative than carbon
B.
Both atoms have equal electronegativity
C.
Carbon is more electronegative than oxygen
D.
Of the presence of lone pair on carbon
😑 View Answer Rough Work Error
ANSWER :
A. Oxygen is more electronegative than carbon
5.
Which of the following is correct regarding the carbonyl group?
A.
C is δ+ and O is δ-
B.
Both C and O are δ+
C.
Both C and O are δ-
D.
C is δ- and O is δ+
😑 View Answer Rough Work Error
ANSWER :
A. C is δ+ and O is δ-
6.
The π-electron cloud in the carbonyl group lies:
A.
In the plane of sp² orbitals
B.
Only below the plane
C.
Above and below the plane of sp² orbitals
D.
Only above the plane
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ANSWER :
C. Above and below the plane of sp² orbitals