Chapter 10 Haloalkanes and Haloarenes MCQs for Class 12 Chemistry

Chapter 10 Haloalkanes and Haloarenes MCQs for Class 12 Chemistry

Here students can practice Chapter 10 Haloalkanes and Haloarenes MCQs for Class 12 Chemistry. All the MCQs are divided into several sub-pages. Each page has 40 MCQs, for the next page just scroll down and click on the button. Also you can practice Class 12 Chemistry MCQs (Multiple Choice Questions) for other units.

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Q 1.: When alkyl halide is heated with dry Ag2O, it produces

(A) Ester

(B) Ether

(C) Ketone

(D) Alcohol

Option – B

Q 2.: A mixture of 1-Chlorobutane and 2-Chlorobutane when treated with alcoholic KOH gives

(A) But-1-ene

(B) But-2-ene

(C) Iso-butylene

(D) Both ‘A’ and ‘B’

Option – D

Q 3.: Which of the following reagents when heated with ethyl chloride, forms ethylene ?

(A) aq. KOH

(B) alc. KOH

(C) Zn/HCl

(D) HI

Option – B

Q 4.: Which one of the following is not true for the hydrolysis of tert-butyl bromide with aqueous NaOH ?

(A) Reaction occurs through the SN1 mechanism

(B) The intermediate formed is a carbocation

(C) Rate of reaction doubles when the concentration of alkali is doubled

(D) Rate of the reaction doubles when the concentration of tert-butyl bromide is doubled

Option – C

Q 5.: To obtain propanenitrile , R – Cl should be

(A) Chloroethane

(B) 1-Chloropropane

(C) Chloromethane

(D) 2-Chloropropane

Option – A

Q 6.: An ethereal solution of alkyl halide is heated with sodium metal. The reaction is known as

(A) Swarts reaction

(B) Sandmeyer’s reaction

(C) Wurtz-fitting reaction

(D) Wurtz reaction

Option – D

Q 7.: The catalyst used in the preparation of an alkyl chloride be the action of dry HCl on an alcohol is

(A) Anhydrous AlCl3

(B) Anhydrous ZnCl2

(C) FeCl2

(D) V2O5

Option – B

Q 8.: Reaction of methyl bromide with aqueous sodium hydroxide involves

(A) Racemisation

(B) SN1 mechanism

(C) SN2 mechanism

(D) Retention of configuration

Option – C

Q 9.: In the group of isomeric alkyl halides, the order of boiling point is

(A) Primary < Secondary < Tertiary

(B) Primary > Secondary > Tertiary

(C) Primary < Tertiary < Secondary

(D) Primary > Tertiary > Secondary

Option – B

Q 10.:

C2H5Cl \( \:\xrightarrow[Ag_{2}O]{Moist}\:A \) \( \:\xrightarrow[Al_{2}O_{3}]{360~^{o}C}\:B \) \( \:\xrightarrow[]{Sn_{2}Cl_{2}}\:C \)

In the above sequence of reaction, identify ‘C’

(A) Mustard gas

(B) Chloretone

(C) Diethyl ether

(D) Ethyl methyl ether

Option – A

Q 11.: The order of reactivities of methyl halide in the formation of Grignard reagent is

(A) CH3Cl < CH3Br < CH3I

(B) CH3Cl > CH3Br > CH3I

(C) CH3Cl > CH3Br < CH3I

(D) CH3Cl < CH3Br > CH3I

Option – A

Q 12.: What are the reagent and reaction conditions used for converting ethyl chloride to ethyl nitrite (as the major product)

(A) AgNO2 , C2H5OH, H2O, ∆

(B) KCN, H2O, ∆

(C) NaNO2 , HCl , 0 0C

(D) KNO2 , C2H5OH, ∆

Option – D

Q 13.: Alkyl halides react with dialkyl copper reagent to give

(A) Alkenyl halides

(B) Alkyl copper halides

(C) Alkenes

(D) Alkanes

Option – D

Q 14.: Ethyl chloride on heating with AgCN forms a compound ‘X’. The functional isomer of ‘X’ is

(A) C2H5NC

(B) C2H5NH2

(C) C2H5CN

(D) None of these

Option – C

Q 15.: Ethyl bromide is industrially prepared from

(A) Ethanol + Br2

(B) Ethanol + HBr

(C) Ethene + Br2

(D) None of these

Option – B

Q 16.: Which of the following compounds will give a yellow precipitate with iodine and alkali ?

(A) Acetophenone

(B) Methyl acetate

(C) Acetamide

(D) 2-Hydroxy propane

Option – D

Q 17.: Hydrolysis of trichloromethane with aqueous KOH gives

(A) Methanol

(B) Formic acid

(C) Acetic acid

(D) Formaldehyde

Option – B

Q 18.: If 1,3-Dibromopropane reacts with zinc and NaI, the product obtained is

(A) Cyclopropane

(B) Propane

(C) Propene

(D) Hexane

Option – A

Q 19.: Reaction of chloroform with KOH in the presence of a primary aromatic amine is called

(A) Stephan reduction

(B) Kolb’s reaction

(C) Carbylamine reaction

(D) HVZ reaction

Option – C

Q 20.: Freon used as refrigerant is

(A) CH2F2

(B) CCl2F2

(C) CF4

(D) CF2=CF2

Option – B

Q 21.: A dihaloalkane ‘X’, having formula C3H6Cl2, on hydrolysis gives a compound, that can reduce Tollen’s reagent. The compound ‘X’ is

(A) 1,2-Dichloropropane

(B) 1,1-Dichloropropane

(C) 1,3-Dichloropropane

(D) 2,2-Dichloropropane

Option – B

Q 22.: The chemical formula of ‘Tear gas’ is

(A) COCl2

(B) CO2

(C) Cl2

(D) CCl3NO2

Option – D

Q 23.: AgNO3 does not give precipitate with CHCl3 because

(A) CHCl3 does not ionise in water

(B) AgNO3 is chemically inert

(C) CHCl3 is chemically inert

(D) Both ‘A’ and ‘C’

Option – A

Q 24.: 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

Option – D

Q 25.: 1,2-Dibromoethane reacts with alcoholic KOH to yield a product ‘X’. The hybridisation state of the carbons present in ‘X’ respectively are :

(A) sp2 , sp

(B) sp , sp

(C) sp3 , sp2

(D) sp3 , sp3

Option – B

Q 26.: Chlorobenzene on treatment with sodium in dry ether gives diphenyl. The name of the reaction is

(A) Wurtz reaction

(B) Wurtz-fitting reaction

(C) Fitting reaction

(D) Gattermann reaction

Option – C

Q 27.: Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains

(A) Mixture of o- and p-bromotoluenes

(B) Mixture of o- and p-bromobenzenes

(C) Mixture of o- and p-bromoaniline

(D) None of These

Option – A

Q 28.: Chlorobenzene reacts with Mg in dry ether to give compound ‘A’, which further reacts with ethanol to give

(A) Phenol

(B) Benzene

(C) Ethyl benzene

(D) Phenyl ether

Option – B

Q 29.: Which one of the following is not formed when a mixture of methyl bromide and bromobenzene is heated with sodium metal in the presence of dry ether ?

(A) Diphenyl

(B) Toluene

(C) Ethane

(D) Propane

Option – D

Q 30.: In Dow’s process, the starting raw material is

(A) Phenol

(B) Aniline

(C) Toluene

(D) Chlorobenzene

Option – D

Q 31.: Chlorination of toluene in the presence of light and heat followed by treatment with aqueous KOH gives

(A) o-Cresol

(B) m-Cresol

(C) p-Cresol

(D) Benzyl alcohol

Option – D

Q 32.: Among the following, which one has the weakest carbon-halogen bond ?

(A) Bromobenzene

(B) Benzyl bromide

(C) Vinyl bromide

(D) Benzyl chloride

Option – B

Q 33.: Which of the following compounds contain maximum number of π-bonds ?

(A) Bromobenzene

(B) 1, 3-Dibromobenzene

(C) 1, 3, 5-Tribromobenzene

(D) All compounds given have same number of π-bonds.

Option – D

Q 34.: The hybridization of carbon attached to chlorine in benzyl chloride is _____

(A) sp

(B) sp2

(C) sp3

(D) sp3d1

Option – C

Q 35.: Which of the following is an example of a germinal Halide ?

(A) 1,1-Dichloropropane

(B) 1,2-Dichloropropane

(C) 1.3-Dichloropropane

(D) 2-Chlorobutane

Option – A

Q 36.: Which one is not a type of stereo chemistry ?

(A) Conformational isomers

(B) Functional isomers

(C) Optical isomers

(D) Geometrical isomers

Option – B

Q 37.: The optically active substances which rotate the plane of polarised light towards right hand side are called ____

(A) Levo-rotatory

(B) Dextro-rotatory

(C) Racemic mixture

(D) Asymmetric carbon

Option – B

Q 38.: Which device is used to measure the magnitude of rotation of the plane of polarised light ?

(A) Spectrometer

(B) Potentiometer

(C) Polarimeter

(D) pH meter

Option – C

Q 39.: The compounds which possess equal mixture of dextro-rotatory (+) and levo-rotatory (-) isomers are called ____

(A) Equimolar mixture

(B) Racemic mixture

(C) Homogenous mixture

(D) Hybrid mixture

Option – B

Q 40.: For which diseases, haloalkanes and haloarenes are used 

(A) Malaria

(B) Typhoid

(C) Both ‘A’ and ‘B’

(D) None to these

Option – C


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We hope that these Chapter 10 Haloalkanes and Haloarenes MCQs for Class 12 Chemistry helped you in learning new concepts. All questions are based on NCERT syllabus and some of them have been asked in various competitive exams. You can go to the next pages to practice more for Chapter 10 Haloalkanes and Haloarenes MCQs for Class 12 Chemistry, click on the question range given above.

Also you can practice Class 12 Chemistry MCQs (Multiple Choice Questions) for other units.