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.
Which of the following halides undergoes nucleophilic substitution most easily?
A.
Chloromethane
B.
Iodomethane
C.
Fluoromethane
D.
Bromomethane
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ANSWER :
B. Iodomethane
2.
What is the nature of the C-X bond in alkyl halides?
A.
Polar covalent bond
B.
Non-polar covalent bond
C.
Ionic bond
D.
None of the above
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ANSWER :
A. Polar covalent bond
3.
Which of the following halides undergoes substitution in the fastest rate?
A.
Chloroalkane
B.
Iodoalkane
C.
Fluoroalkane
D.
Bromoalkane
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ANSWER :
B. Iodoalkane
4.
Which of the following factors affect the rate of nucleophilic substitution in alkyl halides?
A.
Strength of the nucleophile
B.
Size of the alkyl group
C.
Leaving group ability
D.
All of the above
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ANSWER :
D. All of the above
5.
What is the role of the leaving group in a substitution reaction?
A.
It donates electrons
B.
It accepts electrons
C.
It leaves the molecule as a neutral or anionic species
D.
It does not affect the reaction
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ANSWER :
C. It leaves the molecule as a neutral or anionic species
6.
Which of the following halides would undergo SN2 reaction more easily?
A.
Primary halide
B.
Tertiary halide
C.
Secondary halide
D.
None of the above
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ANSWER :
A. Primary halide