MCQs for Chemistry Class 12 with Answers Chapter 10 Haloalkanes and Haloarenes
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 _________.
(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.
(b) Vinyl chloride (chloroethene)
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
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
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?
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 ?
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
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?
Question. Chloroform, when kept open, is oxidised to
(c) CO2 , Cl2
(d) None of these
Question. CHCl3 reacts with cone. HNO3 to give
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?
Question. Which of the following gives iodoform test?
(a) CH3—CH2 (OH)
(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?
Question. In the reaction sequence,
compound ‘X’ is
(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
(c) Vinyl chloride
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 ?
Question. The position of Br in the compound in CH3CH=CHC(Br)(CH3)2 can be classified as _________.
Question. Ethylene dichloride can be prepared by adding HCl to
(d) Ethylene glycol
Question. Optically active isomers but not mirror images are called
Question. 2-Bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is
Question. Which is the correct IUPAC name for CH3—CH— CH2 —C2H5 Br?
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?
Question. For the following (i) IΘ, (ii) ClΘ, (iii) BrΘ, the increasing order of nucleophilicity would be:
(a) IΘ < BrΘ < ClΘ
(b) BrΘ < ClΘ < IΘ
(c) ClΘ < BrΘ < IΘ
(d) IΘ < ClΘ < BrΘ
Question. Which of the following is an example of vic-dihalide?
(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
Question. The process of separation of a racemic modification into d and -enantiomers is called
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
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
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.