Nature of C-X Bond; Mechanisms of Substitution Reactions NEET Questions

Organic Chemistry - Organic Compounds Containing Halogens

Nature of C-X Bond; Mechanisms of Substitution Reactions MCQ Questions


1.
The carbon-halogen bond in alkyl halides is polar because:
A.
Halogen atoms are more electronegative than carbon
B.
Carbon is more electronegative than halogen
C.
Halogen donates electron pair to carbon
D.
Both have equal electronegativity
😑 View Answer Rough Work Error
ANSWER :
A. Halogen atoms are more electronegative than carbon
2.
Which of the following C-X bonds has the highest bond enthalpy?
A.
C-I
B.
C-Br
C.
C-F
D.
C-Cl
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ANSWER :
C. C-F
3.
The correct order of C-X bond length in methyl halides is:
A.
C-I < C-Br < C-Cl < C-F
B.
C-F < C-Br < C-Cl < C-I
C.
C-Cl < C-F < C-Br < C-I
D.
C-F < C-Cl < C-Br < C-I
😑 View Answer Rough Work Error
ANSWER :
D. C-F < C-Cl < C-Br < C-I
4.
Which of the following methyl halides has the highest dipole moment?
A.
CH₃-F
B.
CH₃-Cl
C.
CH₃-Br
D.
CH₃-I
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ANSWER :
B. CH₃-Cl
5.
In the C-X bond of haloalkanes, the partial charges are distributed as:
A.
C carries δ- and X carries δ+
B.
Both atoms carry δ+
C.
C carries δ+ and X carries δ-
D.
Both atoms carry δ-
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ANSWER :
C. C carries δ+ and X carries δ-
6.
The dipole moment of CH₃F is 1.847 D while that of CH₃Cl is 1.860 D. This is because:
A.
F is less electronegative than Cl
B.
Cl has higher polarizability
C.
C-F bond is more ionic
D.
C-Cl bond is longer than C-F bond, compensating for lower electronegativity
😑 View Answer Rough Work Error
ANSWER :
D. C-Cl bond is longer than C-F bond, compensating for lower electronegativity