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Multiple Choice Questions (MCQS)

The document contains multiple choice and short answer questions related to the chemistry of alkyl halides, including their classification, preparation methods, and reactivity. Key topics include the identification of primary, secondary, and tertiary alkyl halides, the use of reagents like SOCl₂ for conversion of alcohols, and various reactions such as Finkelstein and Swarts reactions. It serves as a study guide for understanding the properties and reactions of alkyl halides.

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13 views3 pages

Multiple Choice Questions (MCQS)

The document contains multiple choice and short answer questions related to the chemistry of alkyl halides, including their classification, preparation methods, and reactivity. Key topics include the identification of primary, secondary, and tertiary alkyl halides, the use of reagents like SOCl₂ for conversion of alcohols, and various reactions such as Finkelstein and Swarts reactions. It serves as a study guide for understanding the properties and reactions of alkyl halides.

Uploaded by

mreduacator
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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🔹 Multiple Choice Questions (MCQs)

1. Which of the following is a primary alkyl halide?


A. 2-Bromopropane
B. 1-Bromopropane
C. 2-Chlorobutane
D. Tert-butyl chloride
2. Which reagent is used to convert alcohol into alkyl chloride?
A. HCl/ZnCl₂
B. KOH (aq)
C. NaBr
D. H₂SO₄
3. Which of the following is the best method to prepare fluoroalkanes?
A. Reaction with HF
B. Finkelstein reaction
C. Sandmeyer reaction
D. Swarts reaction
4. In Finkelstein reaction, halogen exchange occurs in:
A. Non-polar solvents
B. Aqueous solvents
C. Polar solvents
D. Protic solvents
5. Chloroform can be prepared by:
A. Heating methane with chlorine
B. Chlorination of ethanol
C. Hydrolysis of trichloroacetaldehyde
D. Distilling bleaching powder with ethanol
6. Which is the correct order of reactivity of alcohols with Lucas reagent?
A. 1° < 2° < 3°
B. 3° < 2° < 1°
C. 2° < 1° < 3°
D. 3° < 1° < 2°
7. In Swarts reaction, the halogen used is:
A. Iodine
B. Bromine
C. Fluorine
D. All of these
8. Which method is suitable for preparing aryl halides?
A. From alcohols
B. From alkanes
C. From diazonium salts
D. From alkenes
9. Which of the following will not give alkyl halide with HX?
A. 1° Alcohol
B. 2° Alcohol
C. 3° Alcohol
D. Phenol
10. Which halogen is most reactive in nucleophilic substitution?
A. F⁻
B. Cl⁻
C. Br⁻
D. I⁻
11. Which of the following is a secondary alkyl halide?
A. 1-Bromopropane
B. 2-Bromopropane
C. Bromomethane
D. 2-Bromo-2-methylpropane
12. R−OH + SOCl₂ → R−Cl + ... ?
A. HCl + H₂O
B. HCl + SO₂
C. SO₂ + H₂O
D. H₂O + SOCl
13. Which of the following reactions is known for better yield and selectivity?
A. Using HCl
B. Using PCl₅
C. Using SOCl₂ with pyridine
D. Using PCl₃
14. A primary alkyl halide is best prepared by:
A. Addition of HX to alkene
B. Substitution of alcohol
C. Halogenation of alkane
D. Finkelstein reaction
15. Which reaction is used to convert R−I to R−F?
A. Swarts reaction
B. Finkelstein reaction
C. Hunsdiecker reaction
D. Darzens reaction

Short Answer Questions


1. Classify the following as primary, secondary, or tertiary alkyl halide:
(i) 2-Bromobutane
(ii) 1-Chloropropane
(iii) Tert-butyl bromide
2. Write the chemical equation for preparation of chloroethane from ethanol.
3. What is Lucas test? How is it used to distinguish between different types of
alcohols?
4. Write the IUPAC name and classification (1°, 2°, or 3°) of: CH₃CHBrCH₃.
5. Give the mechanism of the reaction of 3° alcohol with HCl to form 3° alkyl halide.
6. Why is SOCl₂ preferred over PCl₅ in preparing alkyl chlorides from alcohols?
7. What are the limitations of preparing alkyl halides by direct halogenation of
alkanes?
8. How is bromoethane prepared from ethanol? Write balanced reaction.
9. Explain Swarts reaction with a suitable example.

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