CBSE Class 12 Chemistry Haloalkanes And Haloarenes Notes Set A

Question- On monochlorination of 2-methyl butane, the total number of chiral compound is 

a. 2 

b. 4 

c. 6 

d. 8 

Answer-(a)

Question-Propene is reacted with HBr in presence of peroxides, the product is 

a. 3-bromopropane

b. 1-bromopropane 

c. 2-bromopropane 

d. None of these 

Answer-(b)

Question- A Grignard reagent is prepared by the action of magnesium in dry ether on 

a. C₂H₅OH 

b. C₂H₆ 

c. C₂H₅CL 

d. C₂H₅CN 

Answer-(c)

Question- Butanenitrite may be prepared by heating 

a. Propyl alcohol with KCN 

b. Butyl alcohol with KCN 

c. Butyl chloride with KCN 

d. Propyl chloride with KCN 

Answer-(c)

Question-Meso tartaric acid and d-tartaric acid are 

a. Position isomers 

b. Racemic mixture 

c. Enantiomers 

d. Diastereomers 

Answer-(d)

Question-A mixture of 1-chlorobutane and 2-chlorobutane when treated with alcoholic KOH, gives

a. 1-butene 

b. 2-butene 

c. Isobutene 

d. A mixture of 1-butene and 2-butene 

Answer-(d)

Question-The hydrolysis of optically active 2-bromobutane with aqueous NaOH results in the formation of 

a. (+,−)butan−2−ol

b. (+,−)butan−1−ol

c. (+)butan−2−ol

d. (−) butan−2−ol

Answer-(a)

Question- Which of the following will have a meso-isomer also 

a. 2,3-dichlorobutane 

b. 2-Chlorobutane 

c. 2,3-dichloropentane 

d. 2-hydroxy propanoic acid 

Answer-(a)

Question-The halogen compound which will not react with phenol to give ether is

a. Ethyl chloride 

b. Benzyl chloride 

c. Allyl chloride 

d. Vinyl chloride 

Answer-(d)

Question-Which of the following is not an allylic halide 

a. 4-bromopent-2-ene 

b. 3-Bromo-2-methylbut-1-ene 

c. 1-bromobut-2-ene 

d. 4-bromobut-1-ene 

Answer-(d)

Question-Which of the following is optically active 

a. Butane 

b. 4-Methylheptane 

c. 3-Methylheptane 

d. 2-Methylheptane 

Answer-(c)

 CONCEPT MAP OF HALOALKANES AND HALOARENES

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