Students of class 12 Chemistry should refer to MCQ Questions Class 12 Chemistry Haloalkanes and Haloarenes with answers provided here which is an important chapter in Class 12 Chemistry NCERT textbook. These MCQ for Class 12 Chemistry with Answers have been prepared based on the latest CBSE and NCERT syllabus and examination guidelines for Class 12 Chemistry. The following MCQs can help you to practice and get better marks in the upcoming class 12 Chemistry examination

Chapter 10 Haloalkanes and Haloarenes MCQ with Answers Class 12 Chemistry

MCQ Questions Class 12 Chemistry Haloalkanes and Haloarenes provided below have been prepared by expert teachers of grade 12. These objective questions with solutions are expected to come in the upcoming Standard 12 examinations. Learn the below provided MCQ questions to get better marks in examinations.

Question. Phosgene is a common name for
(a) phosphoryl chloride
(b) thionyl chloride
(c) carbon dioxide and phosphine
(d) carbonyl chloride

Question. Halogenation of alkanes is
(a) a reductive process
(b) an oxidative process
(c) an isothermal process
(d) an endothermal process

Questio. Which of the following is vinylic halide?

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

Question. Ethylidene chloride is a/an _________. 
(a) vic-dihalide
(b) gem-dihalide
(c) allylic halide
(d) vinylic halide

Question. Haloalkanes contain halogen atom(s) attached to the sp3 hybridised carbon atom of an alkyl group. Identify haloalkane from the following compounds. 
(a) 2-Bromopentane
(b) Vinyl chloride (chloroethene)
(c) 2-Chloroacetophenone
(d) Trichloromethane

Question. A Grignard reagent may be made by reacting magnesium with
(a) Methyl amine
(b) Diethyl ether
(c) Ethyl iodide
(d) Ethyl alcohol

Question. The IUPAC name of the compound

(a) 4-fluoro-1-methyl-3-nitrobenzene
(b) 1-fluoro-4-methyl-2-nitrobenzene
(c) 2-fluoro-5-methyl-1-nitrobenzene
(d) 4-methyl-1-fluoro-2-nitrobenzene

Question. Which one of the following halogen compounds is difficult to be hydrolysed by SN1 mechanism?
(a) Tertiary butyl chloride
(b) Isopropyl chloride
(c) Benzyl chloride
(d) Chlorobenzene

Question. Alkyl halides undergoing nucleophilic bimolecular substitution involve
(a) retention of configuration
(b) racemic mixture
(c) inversion of configuration
(d) formation of carbocation

Question. Chlorobenzene is formed by reaction of chlorine with benzene in the presence of AlCl3. Which of the following species attacks the benzene ring in this reaction?
(a) Cl^–
(b) Cl⁺
(c) AlCl₃
(d) [AlCl₄]^–

Question. Which of the following is a primary halide?
(a) Isopropyl iodide
(b) Secondary butyl iodide
(c) Tertiary butyl bromide
(d) Neohexyl chloride

Question. Arrange the following compounds in the increasing order of their densities.

(a) (i) < (ii) < (iii) < (iv)
(b) (i) < (iii) < (iv) < (ii)
(c) (iv) < (iii) < (ii) < (i)
(d) (ii) < (iv) < (iii) < (i)

Question. How many structural isomers are possible for a compound with molecular formula C₃H₇Cl ?
(a) 2
(b) 5
(c) 7
(d) 9

Question. The compound which contains all the four 1°, 2°, 3° and 4° carbon atoms is
(a) 2, 3-dimethyl pentane
(b) 3-chloro-2, 3-dimethylpentane
(c) 2, 3, 4-trimethylpentane
(d) 3, 3-dimethylpentane

Question. Which reagent will you use for the following reaction? 
CH₃CH₂CH₂CH₃→CH₃CH₂CH₂CH₂Cl + CH₃CH₂CHClCH₃
(a) Cl2 / UV light
(b) NaCl + H2SO4
(c) Cl2 gas in dark
(d) Cl2 gas in the presence of iron in dark

Question. Two possible stereo-structure of CH₃—CH(OH)COOH which are optically active are called
(a) mesomers
(b) enantiomers
(c) diastereomers
(d) atropisomers

Question. Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is ________________.
(a) Electrophilic elimination reaction
(b) Electrophilic substitution reaction
(c) Free radical addition reaction
(d) Nucleophilic substitution reaction

Question. Arrange the following compounds in increasing order of their boiling points.

(a) (ii) < (i) < (iii)
(b) (i) < (ii) < (iii)
(c) (iii) < (i) < (ii)
(d) (iii) < (ii) < (i)

Question. Chlorobenzene is prepared commercially by
(a) Raschig process
(b) Wurtz Fittig reaction
(c) Friedel-Craft’s reaction
(d) Grignard reaction

Question. Which of the following possesses highest melting point?
(a) Chlorobenzene
(b) m-dichlorobenzene
(c) o-dichlorobenzene
(d) p-dichlorobenzene

Question. Chloroform, when kept open, is oxidised to 
(a) CO₂
(b) COCl₂
(c) CO₂ , Cl₂
(d) None of these

Question. CHCl₃ reacts with cone. HNO₃ to give
(a) CCl3NO₂
(b) CH₃NO₂
(c) CH₃CN
(d) CH₃CH₂NO₂

Question. Which of the following is added to chloroform to slow down its aerial oxidation in the presence of light?
(a) Carbonyl chloride 
(b) Ethyl alcohol
(c) Sodium hydroxide
(d) Nitric acid

Question. Which of the following will not give positive iodoform test? 
(a) CH₃CH₂CHOHCH₃
(b) CH₃CH₂CH₂COCH₃
(c) CH₃CH₂COCH₂CH₃
(d) CH₃COC₆H₅

Question. Which of the following gives iodoform test?
(a) CH₃—CH₂ (OH)
(b) C₂H₅CHO
(c) (CH₂OH)₂
(d) None of these

Question. Hexachloroethane is also called
(a) artificial sweetner
(b) artificial camphor
(c) artificial polymer
(d) None of these

Question. The reaction in which phenol differs from alcohol is
(a) it undergoes esterification with carboxylic acid
(b) it reacts with ammonia
(c) it forms yellow crystals of iodoform
(d) it liberates H₂ with Na metal

Question. Which one of the following compounds when heated with KOH and a primary amine gives carbylamine test?
(a) CHCl₃
(b) CH₃Cl 
(c) CH₃OH
(d) CH₃CNC

Question. In the reaction sequence,

compound ‘X’ is
(a) chlorobenzene
(b) benzene
(c) toluene
(d) biphenyl methane

Question. Methyl ketone is identified by 
(a) lodoform test
(b) Fehling’s solution
(c) Tollen’s reagent
(d) Schiffs reagent

Question. An organic molecule necessarily shows optical activity if it
(a) contains asymmetric carbon atoms
(b) is non-polar
(c) is non-superimposable on its mirror image
(d) is superimposable on its mirror image

Question. The IUPAC name of CH₂=CH= CH₂Cl is
(a) Allyl chloride
(b) 1-chloro-3-propene
(c) Vinyl chloride
(d) 3-chloro-1-propene

Question. Which of the following halide is 2° ?
(a) Isopropyl chloride
(b) Isobutyl chloride
(c) n-propyl chloride
(d) n-butyl chloride

Question. An alkyl halide by formation of its Grignard reagent and heating with water yields propane. What is the original alkyl halide ?
(a) Methyl iodide
(b) Ethyl iodide
(c) Ethyl bromide
(d) Propyl bromide

Question. Which of the following structures is enantiomeric with the molecule (A) given below:

Question. Elimination of bromine from 2-bromobutane results in the formation of –
(a) predominantly 2-butyne
(b) predominantly 1-butene
(c) predominantly 2-butene
(d) equimolar mixture of 1 and 2-butene

Question. Benzene hexachloride is
(a) 1, 2, 3, 4, 5, 6 – hexachlorocyclohexane
(b) 1, 1, 1, 6, 6, 6 – hexachlorocyclohexane
(c) 1, 6 – phenyl – 1, 6 – chlorohexane
(d) 1, 1 – phenyl – 6, 6 -chlorohexane

Question. In SN1 reaction, the recemization takes place. It is due to
(a) inversion of configuration
(b) retention of configuration
(c) conversion of configuration
(d) Both (a) and (b)

Question. Which of the following is an optically active compound ?
(a) 1-Butanol
(b) 1-Propanol
(c) 2-Chlorobutane
(d) 4-Hydroxyheptane

Question. The position of Br in the compound in CH₃CH=CHC(Br)(CH₃)₂ can be classified as _________.
(a) Allyl
(b) Aryl
(c) Vinyl
(d) Secondary

Question. Ethylene dichloride can be prepared by adding HCl to
(a) Ethane
(b) Ethylene
(c) Acetylene
(d) Ethylene glycol

Question. Optically active isomers but not mirror images are called
(a) enantiomers
(b) mesomers
(c) tautomers
(d) diastereomers

Question. 2-Bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is
(a) 2-ethoxypentane
(b) pentene-1
(c) trans-2-pentene
(d) cis-pentene-2

Question. Which is the correct IUPAC name for CH₃—CH— CH₂ —C₂H₅ Br? 
(a) 1-Bromo-2-ethylpropane
(b) 1-Bromo-2-ethyl-2-methylethane
(c) 1-Bromo-2-methylbutane
(d) 2-Methyl-1-bromobutane

Question. Conant Finkelstein reaction for the preparation of alkyl iodide is based upon the fact that
(a) Sodium iodide is soluble in methanol, while sodium chloride is insoluble in methanol
(b) Sodium iodide is soluble in methanol, while NaCl and NaBr are insoluble in methanol
(c) Sodium iodide is insoluble in methanol, while NaCl and NaBr are soluble
(d) The three halogens differ considerably in their electronegativity

Question. Which of the following alkyl halides will undergo SN1 reaction most readily? 
(a) (CH₃)₃C—F
(b) (CH₃)₃C—Cl
(c) (CH₃)₃C—Br
(d) (CH₃)₃C—I

Question. For the following (i) I^Θ, (ii) Cl^Θ, (iii) Br^Θ, the increasing order of nucleophilicity would be:
(a) I^Θ < Br^Θ < Cl^Θ 
(b) Br^Θ < Cl^Θ < I^Θ
(c) Cl^Θ < Br^Θ < I^Θ 
(d) I^Θ < Cl^Θ < Br^Θ

Question. Which of the following is an example of vic-dihalide? 
(a) Dichloromethane
(b) 1,2-dichloroethane
(c) Ethylidene chloride
(d) Allyl chloride

Question. An important chemical method to resolve a racemic mixture makes use of the formation of
(a) a meso compound
(b) enantiomers
(c) diasteromers
(d) racemates

Question. The process of separation of a racemic modification into d and 􀁁 -enantiomers is called
(a) Resolution
(b) Dehydration
(c) Revolution
(d) Dehydrohalogenation

Question. Racemic compound has
(a) equimolar mixture of enantiomers
(b) 1 : 1 mixture of enantiomer and diastereomer
(c) 1 : 1 mixture of diastereomers
(d) 1 : 2 mixture of enantiomers

Question. Which of the following is most preferred to prepare alkylchloride from alcohol?
(a) Concentrated HCl
(b) SOCl₂
(c) PCl₅
(d) PCl₃

Question. Ethylene chloride and ethylidene chloride are isomers. Identify the correct statements.
(a) Both the compounds form same product on treatment with alcoholic KOH.
(b) Both the compounds form same product on treatment with aq. NaOH.
(c) Both the compounds form same product on reduction.
(d) Both the compounds are optically active.

Question. An alkyl halide reacts with metallic sodium in dry ether. The reaction is known as :
(a) Frankland’s reaction
(b) Sandmeyer’s reaction
(c) Wurtz reaction
(d) Kolbe’s reaction

Question. When 2-bromobutane reacts with alcoholic KOH, the reaction is called
(a) halogenation
(b) chlorination
(c) hydrogenation
(d) dehydrohalogenation

We hope the above multiple choice questions for Class 12 Chemistry for Chapter 10 Haloalkanes and Haloarenes provided above with answers based on the latest syllabus and examination guidelines issued by CBSE, NCERT and KVS are really useful for you. Haloalkanes and Haloarenes is an important chapter in Class 12 as it provides very strong understanding about this topic. Students should go through the answers provided for the MCQs after they have themselves solved the questions. All MCQs have been provided with four options for the students to solve. These questions are really useful for benefit of class 12 students. Please go through these and let us know if you have any feedback in the comments section.