MCQs For NCERT Class 12 Chemistry Chapter 10 Haloalkanes and Haloarenes

Please refer to the MCQ Questions for Class 12 Chemistry Chapter 10 Haloalkanes and Haloarenes with Answers. The following Haloalkanes and Haloarenes Class 12 Chemistry MCQ Questions have been designed based on the latest syllabus and examination pattern for Class 12. Our experts have designed MCQ Questions for Class 12 Chemistry with Answers for all chapters in your NCERT Class 12 Chemistry book.

Haloalkanes and Haloarenes Class 12 MCQ Questions with Answers

See below Haloalkanes and Haloarenes Class 12 Chemistry MCQ Questions, solve the questions and compare your answers with the solutions provided below.

Question. Chloroform and conc. HNO₃ react to produce       
(a) CHCl₂NO₂
(b) CHCl₂HNO₃
(c) CCl₃NO₂
(d) CCl₃NO₃

Question. Benzene diazonium chloride reacts with hypophosphorous acid to produce:        
(a) phenol
(b) benzene
(c) p-hydroxyazobenzene
(d) benzonitrile

Question. B.H.C. is used as an:        
(a) Insecticide
(b) Disinfectant
(c) Mosquito repellent
(d) Antiseptic

Question. Which one of the following produces acyl halide by treatment with PCl5?       
(a) Alcohols
(b) Esters
(c) Acids
(d) Carbonyl compounds

Question. When two halogens are attached to same carbon atom, it is known as :       
(a) vic-dihalide
(b) gem-dihalide
(c) ∝, ω-dihalide
(d) ∝, β-dihalide

Question. Gammexane is :      
(a) Chloral
(b) BHC
(c) DDT
(d) HCB

Question. Which of the following is a chiral compound?       
(a) hexane
(b) n-butane
(c) methane
(d) 2,3,4-trimethylhexane

Question. The reaction :       
C₂H₅ OH + SOCl₂ ^Pyridine—— C₂H₅Cl + SO₂ + HCl is known as 
(a) Kharasch effect
(d) 2-pentene

Question. Among the following, the most reactive towards alcoholic KOH is :        
(a) CH₂=CHBr
(b) CH₃COCH₂CH₂Br
(c) CH₃CH₂Br
(d) CH₃CH₂CH₂Br

Question. Among the following, the dissociation constant is highest for :        
(a) C₆H₅OH
(b) C₆H₅CH₂OH
(c) CH₃C ≡ CH
(d) CH3 NH₃⁺ Cl^–

Question. Among the following which one can have a meso orm? 
(a) CH₃CH(OH)CH(Cl)C₂H₅
(b) CH₃CH(OH)CH(OH)CH₃
(c) C₂H₅CH(OH)CH(OH)CH₃
(d) HOCH₂CH(Cl)CH₃

Question. The correct increasing order of the reactivity of halides for SN₁ reaction is :
(a) CH₃ – CH₂ – X < (CH₃)₂CH – X <
CH2 = CH – CH₂ – X < PhCH₂ – X
(b) (CH₃)₂CH – X < CH₃ – CH₂ – X <
CH₂ = CH – CH₂ – X < PhCH2 – X
(c) PhCH₂ – X < (CH₃)₂CH – X <
CH₃ –CH₂ – X < CH₂ = CH – CH₂ – X
(d) CH₂ = CH – CH₂ – X < PhCH₂ – X
<CH₃ –CH – X < CH₃ – CH₂ – X

Question. Which of the following statements is incorrect regarding benzyl chloride? 
(a) It gives white precipitate with alcoholic AgNO₃
(b) It is an aromatic compound with substitution in the side chain
(c) It undergoes nucleophilic substitution reaction
(d) It is less reactive than vinyl chloride       

Question. For the preparation of Jrnitroiodobenzene from Jrnitroaniline, the best method is 
(a) NaNO₂ / HCl followed by KI
(b) NaNO₂ / HCl followed by CuCN
(c) LiAlH₄ followed by l₂
(d) NaBH₄ followed by l₂     

Question. p-nitrobromobenzene can be converted to p-nitroaniline by using NaNH₂ . The reaction proceeds through the intermediate named 
(a) carbocation
(b) carbanion
(c) benzyne
(d) dianion     

Question.

Question. Which of the following compounds is not formed in iodoform reaction of acetone?
(a) CH₃COCH₂l
(b) ICH₂COCH₂l
(c) CH₃COCHl₂
(d) CH₃COCl₃   

Question. Which of the compounds when brominated turns to meso 2, 3-dibromobutane? 
(a) Cis-2-butene
(b) Iso-butane
(c) Butane
(d) Trans-2-butene   

Question. Which of the following does not answer iodoform test?
(a) n-butyl alcohol 
(b) Acetophenone
(c) Acetaldehyde
(d) Ethylmethyl ketone     

Question. Reaction of alkyl halides with aromatic compounds in presence of anhy. AlCl₃ is known as 
(a) Friedel-Craft reaction
(b) Hofmann degradation
(c) Kolbe’s synthesis
(d) Beckmann reanangement     

Question. When chloroform is treated with chlorine in the presence of sunlight, it yields 
(a) urotropin
(b) pyrene
(c) chloropicrin
(d) chloritone     

Question. On warming with silver powder, chloroform is converted into 
(a) acetylene
(b) hexachloroethane
(c) 1, 1, 2, 2-tetrachloroethane
(d) ethylene       

Question. Which of the following compounds has the highest boiling point?       
(a) CH₃CH₂CH₂Cl
(b) CH₃CH₂CH₂CH₂Cl
(c) CH₃CH(CH₃ )CH₂Cl 
(d) (CH₃)₃CCl

Question. Rectified spirit is a mixture of        
(a) 95% ethyl alcohol + 5% water
(b) 94% ethyl alcohol + 4.53 water
(c) 94.4% ethyl alcohol + 5.43% water
(d) 95.87% ethyl alcohol + 4.13% water

Question. The pesticide DDT slowly changes to         
(a) CCl₃-CHO and chlorobenzene
(b) p, p’-Dichlorodiphenylethene
(c) p, p’-Dichlorodiphenyldichloroethane
(d) p, p’-Dichlorodiphenyldichloroethene

Question. The solution of a chemical compound reacts with AgNO₃ solution to form a white preciptate of Y which dissolves in NH₄OH to give a complex Z. When Z is treated with dilute HNO₃, Y reappears.
The chemical compound X can be: 
(a) NaCl
(b) CH3Cl
(c) NaBr
(d) NaI

Question. The synthesis of alkyl fluorides is best accomplished by :        
(a) Finkelstein reaction
(b) Swarts reaction
(c) Free radical fluorination
(d) Sandmeyer’s reaction

Question. (CH₃)₃CMgCl on reaction with D₂O produces :
(a) (CH₃)₃CD
(b) (CH₃)₃OD
(c) (CD₃)₃CD
(d) (CD₃)₃OD

Question. Most reactive halide towards SN1 reaction is       
(a) n-Butyl chloride
(b) sec-Butyl chloride
(c) tert-Butyl chloride
(d) Allyl chloride

Question. Arrange the following halides in the decreasing order of SN1 reactivity :       
CH₃ CH₂ CH₂ Cl, CH₂ CHCH(Cl)CH₃ ,
       I                      II
CH₃CH₂CH(Cl)CH₃
            III
(a) I > II > III
(b) II > I > III
(c) II > III > I
(d) III > II > I

Question. Which one of the following alkyl halides has the lowest boiling point?       
(a) n-Butyl chloride
(b) iso-Butyl chloride
(c) sec-Butyl chloride
(d) tert-Butyl chloride

Question. Although hexafluoroethane (C₂F₆, b.p. –79ºC) and ethane (C₂H₆, b.p. – 89ºC) differ very much in their molecular weights, their boiling points differ only by 10ºC. This is due to             
(a) low polarizability of F
(b) nearly similar size of F and H
(c) both (a) and (b)
(d) Neither of the two

Question. Chloropicrin is obtained by the reaction of             
(a) steam on carbon tetrachloride
(b) nitric acid on chlorobenzene
(c) chlorine on picric acid
(d) nitric acid on chloroform