Organic Chemistry Questions and Answers – Alkyl Halides | Organic Chemistry Multiple Choice Questions and Answers

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Questions
1 Which C-X bond has the highest bond energy per mole?
A C-Br
B C-Cl
C C-F
D C-I

Answer: C-F
2 Which alkyl halide has the highest reactivity for a particular alkyl group?
A R-F
B R-Cl
C R-I
D R-Br

Answer: R-I
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3 When ethyl chloride reacts with nascent hydrogen, what is the formed product?
A Methane
B Propane
C Butane
D Ethane

Answer: Ethane
4 Which alkyl halide out of the following may follow both SN1 and SN2 mechanism?
A CH3-X
B (CH3)2CH-X
C (CH3)3C-X
D (CH3)3C-CH2-X

Answer: (CH3)2CH-X
5 When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed?
A 2 moles of ethane
B 1 moles of ethane
C 2 moles of butane
D 1 moles of butane

Answer: 1 moles of butane
6 Which of the following halide can give best SN2 reaction?
A Primary alkyl halide
B Tertiary alkyl halide
C Secondary alkyl halide
D All can give SN2 reaction at same rate

Answer:Primary alkyl halide
7 Why alkyl halides are considered to be very reactive compounds towards nucleophile?
A they have an electrophilic carbon & a bad leaving group
B they have a nucleophilic carbon & a good leaving group
C they have an electrophilic carbon
D they have an electrophilic carbon & a good leaving group

Answer: they have an electrophilic carbon & a good leaving group
8 In primary alkyl halides, carbon attached to the halogen atom is further attached to how many carbon atoms?
A 1
B 2
C 3
D 4

Answer: 1
9 Which of the following is not the method of preparation of alkyl halide?
A Darzen’s method
B Halogenation of alkene
C Addition of HX on alkenes
D Hydration of alkene

Answer: Hydration of alkene
10 Which of the following reactant gives the best method of preparation of alkyl halides when reacts with alcohol?
A Zn/HCl
B PCl5
C SOCl2/ Pyridine
D PCl3

Answer:SOCl2/ Pyridine
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