Haloalkanes and Haloarenes Class 12 MCQ Online Test With Answers Questions

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 10 Haloalkanes and Haloarenes with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Haloalkanes and Haloarenes Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Class 12 Chemistry Chapter 10 MCQ With Answers

Chemistry Class 12 Chapter 10 MCQs On Haloalkanes and Haloarenes

Haloalkanes And Haloarenes Class 12 MCQ Question 1.
Good conductor of electricity and heat is
(a) Anthracite coke
(b) Diamond
(c) Graphite
(d) Charcoal

Answer

Answer: (c) Graphite

Haloalkanes And Haloarenes MCQ Question 2.
In which of the following allotropes of carbon, percentage of carbon is maximum?
(a) Wood charcoal
(b) Coconut charcoal
(c) Graphite
(d) None of these

Answer

Answer: (c) Graphite

MCQ Of Haloalkanes And Haloarenes Class 12 Question 3.
The hybridisation of carbon in diamond is
(a) sp³
(b) sp²
(c) sp
(d) dsp²

Answer

Answer: (a) sp³

MCQ On Haloalkanes And Haloarenes Class 12 Question 4.
Organic compound must contain an element
(a) oxygen
(b) carbon
(c) hydrogen
(d) nitrogen

Answer

Answer: (b) carbon

Solve using Substitution Calculator solves the linear equations having unknown variables in a fraction of seconds.

Haloalkanes And Haloarenes MCQ Questions With Answers Pdf Question 5.
Alkene gives which of the following reactions?
(a) Addition reaction
(b) Substitution reaction
(c) Both (a) and (b)
(d) None of these

Answer

Answer: (c) Both (a) and (b)

Class 12 Chemistry Haloalkanes And Haloarenes MCQ Question 6.
Single bond length between carbon-carbon is
(a) 1.34 Å
(b) 1.20 Å
(c) 1.54 Å
(d) none of these

Answer

Answer: (c) 1.54 Å

Haloalkane And Haloarene MCQ Question 7.
Valency of carbon is
(a) 1
(b) 2
(c) 3
(d) 4

Answer

Answer: (d) 4

Class 12 Haloalkanes And Haloarenes MCQ Question 8.
Criteria for purity of organic solid is
(a) boiling point
(b) melting point
(c) specific gravity
(d) none of these

Answer

Answer: (b) melting point

Haloalkanes And Haloarenes Class 12 MCQ With Answers Question 9.
General formula of Alkene is
(a) C_nH_2n
(b) C_nH_2n+2
(c) C_nH_2n-2
(d) none of these

Answer

Answer: (a) C_nH_2n

MCQ Questions On Haloalkanes And Haloarenes Question 10.
Hybridisation of carbon in ethane is
(a) sp³
(b) sp²
(c) sp
(d) sp³d²

Answer

Answer: (a) sp³

Class 12 Chemistry Chapter 10 MCQ Question 11.
Number of π bonds in ethyne is
(a) 1
(b) 2
(c) 3
(d) 4

Answer

Answer: (b) 2

Haloalkanes And Haloarenes MCQ Class 12 Question 12.
The compound having general formula C_nH_2n+2 is
(a) Alkene
(b) Alkyne
(c) Alkane
(d) none of these

Answer

Answer: (c) Alkane

MCQ Haloalkanes And Haloarenes Question 13.
Which of the following is not correctly matched with its IUPAC name?
(a) CHF₂CBrClF : 1-Bromo-1-chIoro-1, 2, 2-trifluoroethane
(b) (CCl₃)₃CCl : 2-(Trichloromethyl)-1, 1, 2, 3, 3-heptachloropropane
(c) CH₃C (p-ClC₆H₄)₂CH(Br)CH₃ : 2-Bromo-3, 3-bis (4- chlorophenyl) butane
(d) o-BrC₆H₄CH (CH₃) CH₂CH₃ : 2-Bromo-l- methylpropylbenzene

Answer

Answer: (b) (CCl₃)₃CCl : 2-(Trichloromethyl)-1, 1, 2, 3, 3-heptachloropropane

Haloalkanes And Haloarenes Class 12 MCQs Question 14.
The negative part of the addendum (the molecule to be added) adds on the carbon atom of the double bond containing the least number of hydrogen atoms. This rule is known as
(a) Saytzeffs rule
(b) Peroxide rule
(c) Markovnikov’s rule
(d) van’t hoff rule

Answer

Answer: (c) Markovnikov’s rule

MCQ Questions On Haloalkanes And Haloarenes Class 12 Question 15.
Which of the following compounds can yield only one monochlorinafed product upon free radical chlorination?
(a) 2, 2-Dimethylpropane
(b) 2-Methylpropane
(c) 2-Methylbutane
(d) n-Butane

Answer

Answer: (a) 2, 2-Dimethylpropane

Question 16.
The reaction

is an example of
(a) nucleophilic addition
(b) free radical addition
(c) electrophilic addition
(d) electrophilic substitution

Answer

Answer: (c) electrophilic addition

Integration by Substitution Calculator online with solution and steps.

Question 17.
Halogen acids react with alcohols to form alkyl halides. The reaction follows a nucleophilic substitution mechanism. What will be the product of the following reaction?

(d) CH₃CH₂CH₂CH₂CH₂Cl

Answer

Answer: (a)

Question 18.
Bromination of methane in presence of sunlight is a
(a) nucleophilic substitution
(b) free radical substitution
(c) electrophilic substitution
(d) nucleophilic addition

Answer

Answer: (b) free radical substitution

Question 19.
Which of the following reactions follows Markovnikov’s rule?
(a) C₂H₄ + HBr
(b) C₃H₆ + Cl₆
(c) C₃H₆ + HBr
(d) C₃H₆ + Br₂

Answer

Answer: (c) C₃H₆ + HBr

Question 20.
The reaction of toluene with chlorine in presence of FeCl₃ gives predominantly.
(a) amixture of o-and p-chlorotoluene
(b) benzyl chloride
(c) m-chlorotuluene
(d) benzoyl chloride

Answer

Answer: (a) amixture of o-and p-chlorotoluene

Question 21.
Which of the following compounds has the highest boiling point?
(a)CH₃CH₂CH₂Cl
(b) CH₃CH₂CH₂CH₂Cl
(c) CH₃CH(CH₃)CH₂Cl
(d) (CH₃)₃CCl

Answer

Answer: (b) CH₃CH₂CH₂CH₂Cl

Question 22.
Which of the following molecules has highest dipole moment?
(a) CH₃Cl
(b) CH₂Cl₂
(c) CHCl₅
(d) CCl₄

Answer

Answer: (a) CH₃Cl

Question 23.
Arrange the following compounds in-decreasing order of their boiling points
(i) CH₃Br
(ii) CH₃CH₂Br
(iii) CH₃CH₂CH₂Br
(iv) CH₂CH₂CH₂CH₂Br
(a) (i) > (ii) > (iii) > (iv)
(b) (iv) > (iii) > (ii) > (i)
(c) (i) > (iii) > (ii) > (iv)
(d) (iii) > (iv) > (i) > (ii)

Answer

Answer: (b) (iv) > (iii) > (ii) > (i)

Question 24.

X and Y in the reaction are

Answer

Answer: (a)

Question 25.
Alkyl halides are immiscible in water though they are polar because
(a) they react with water to give alcohols
(b) they cannot form hydrogen bonds with water
(c) C -X bond cannot be broken easily
(d) they are stable compounds and are not reactive

Answer

Answer: (b) they cannot form hydrogen bonds with water

Question 26.
Which one of the following is not correct order of boiling .points of the alkyl/aryl halides?
(a) CHCl₃ > CH₂Cl₂
(b) CH₃(CH₂)₃CI > CH₃(CH₂)₂Cl
(c) (CH₃)₃CCl > (CH₃)₂CHCH₂Cl
(d) CH₃(CH₂)₃Cl > CH₃CH₂CHClCH₃

Answer

Answer: (c) (CH₃)₃CCl > (CH₃)₂CHCH₂Cl

Question 27.
Which of the following compounds will have highest melting point?
(a) Chlorobenzene
(b) o-Dichlorobenzene
(c) m-Dichlorobenzene
(d) p-Dichlorobenzene

Answer

Answer: (d) p-Dichlorobenzene

Question 28.
Ethyl alcohol is obtained when ethyl chloride is boiled with
(a) alcoholic KOH
(b) aqueous KOH
(c) water
(d) aqueous KMnO₄

Answer

Answer: (b) aqueous KOH

Question 29.
Which of the following alkyl halides undergoes hydrolysis with aqueous KOH at the fastest rate?
(a) CH₃CH₂CH₂Cl
(b) CH₃CH₂Cl
(C) CH₃CH₂CH₂CH₂Cl
(d) CH₃CH₂CH (Br) CH₃

Answer

Answer: (d) CH₃CH₂CH (Br) CH₃

Question 30.
Butane nitrile can be prepard by heating.
(a) propyl alcohol with KCN
(b) butyl chloride with KCN
(c) butyl alcohol with KCN
(d) propyl chloride with KCN

Answer

Answer: (d) propyl chloride with KCN

Question 31.
Which of the following reactions will give the major and minor products?

(a) (a) is major product and (b) is minor product
(b) (a) is minor product and (b) is major product
(c) Both (a) and (b) are major products
(d) Only (b) is formed and (a) is not formed

Answer

Answer: (a) (a) is major product and (b) is minor product

Question 32.

The final product in the reaction is
(a) CH₃OH
(b) HCOOH
(c) CH₃OH
(d) CH₃COOH

Answer

Answer: (d) CH₃COOH

Question 33.
The end product (Q) is in the following sequence of reaction

Answer

Answer: (c)

Question 34.
Methyl bromide reacts with AgF to give methyl fluoride and silver bromide. This reaction is called
(a) Fittig reaction
(b) Swarts reaction
(c) Wurtz reaction
(d) Finkelstein reaction

Answer

Answer: (b) Swarts reaction

Question 35.
The alkyl halide is converted into an alcohol by
(a) elimination
(b) dehydrohalogenation
(c) addition
(d) substitution

Answer

Answer: (d) substitution

Question 36.
A mixture of 1-chloropropane and 2-chloropropane when treated with alcoholic KOH gives
(a) prop-1-ene
(b) prop-2-ene
(c) a mixture of prop-1 -ene and prop-2-ene
(d) propanol

Answer

Answer: (a) prop-1-ene

Question 37.
An alkyl halide, RX reacts with KCN to given propane nitrile, RX is
(a) C₃H₇Br
(b) C₄H₉Br
(c) C₂H₅Br
(d) C₅H₁₁Br

Answer

Answer: (c) C₂H₅Br

Question 38.
In S_N² reactions with the sequence of bond breaking and bond formation is as follows
(a) bond breaking is followed by formation
(b) bond formation is followed by breaking
(c) bond breaking and formation are simultaneously
(d) bond breaking and formation take place randomly

Answer

Answer: (c) bond breaking and formation are simultaneously

Question 39.
Grignard reagents are formed by the reaction of alkyl halides by warming
(a) with alcoholic solution
(b) with MgCl₂
(c) Mg in presence of dry ether
(d) with MgCO₃

Answer

Answer: (c) Mg in presence of dry ether

Question 40.
Which of the following is the most reactive towards nucleophilic substitution reaction?
(a) ClCH₂– CH = CH₂
(b) CH₂ = CH-Cl
(c) CH₃CH = CH-Cl
(d) C₆H₆Cl

Answer

Answer: (a) ClCH₂-CH = CH₂

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