Class 12 Chemistry MCQs Haloalkanes And Haloarenes for JEE/NEET

Here, you will get Class 12 Chemistry MCQ of Chapter 10 Haloalkanes And Haloarenes for cracking JEE and NEET/AIIMS. By solving these MCQs of Class 12 Chemistry Chapter 10 Haloalkanes And Haloarenes, you will get the confidence to crack JEE or NEET. Practice MCQ Questions for Class 12 Chemistry with Answers on a daily basis and score well in exams. 

Haloalkanes And Haloarenes 12 MCQs Questions with Answers

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: (c) Graphite

Alkene gives which of the following reactions?
(a) Addition reaction
(b) Substitution reaction
(c) Both (a) and (b)
(d) None of these

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

Criteria for purity of organic solid is
(a) boiling point
(b) melting point
(c) specific gravity
(d) none of these

Answer: (b) melting point

Number of π bonds in ethyne is
(a) 1
(b) 2
(c) 3
(d) 4

Answer: (b) 2

Gem-dibromide is
(a) CH3CH(Br)CH2(Br)
(b) CH3CBr2CH3
(c) CH2(Br)CH2CH2
(d) CH2BrCH2Br

Answer: (b) CH3CBr2CH3

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

Answer: (d) Neohexyl chloride

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

Answer: (b) 3-chloro-2, 3-dimethylpentane

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

Answer: (d) 3-chloro-1-propene

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

Answer: (b) an oxidative process

CH3CH2CH2Br + NaCN → CH3CH2CH2CN + NaBr, will be fastest in
(a) ethanol
(b) methanol
(c) N, N dimethyl formamide
(d) Water

Answer: (c) N, N dimethyl formamide

A dihalogen derivative ‘X’ of a hydrocarbon with three carbon atoms react with ale. KOH and produces hydrocarbon which forms red ppt. with ammonical Cu2Cl2. ‘X’ gives an aldehyde on reaction with aq. KOH. The compound ‘X’ is
(a) 1, 3-Dichloropropane
(b) 1, 2-Dichloropropane
(c) 2, 2-Dichloropropane
(d) 1, 1-Dichloropropane

Answer: (d) 1, 1-Dichloropropane

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

Answer: (d) (CH3)3 C—I

SN1 reaction of alkyl halides lead to
(a) Retention of configuration
(b) Racemisation
(c) Inversion of configuration
(d) None of these

Answer: (b) Racemisation

The reactivity order of halides for dehydrogenation is
(a) RF > RCl > RBr > RI
(b) RI > RBr > RCl > RF
(c) RI > RCl > RBr > RF
(d) RF > RI > RBr > RCl

Answer: (b) RI > RBr > RCl > RF

Unpleasant smelling carbylamines are formed by heating alkali and chloroform with
(a) Any aliphatic amine
(b) Any aromatic amine
(c) Any amine
(d) Any primary amine

Answer: (d) Any primary amine

An organic compound, on treatment with Br2 in CCl4 gives bromo derivative of an alkene. The compound will be
(a) CH4-CH = CH2
(b) CH3-CH = CH-CH3
(c) HC = CH
(d) H2C = CH2

Answer: (c) HC = CH

If one H is replaced by a Cl atom in C4H9Cl, the total number of structural isomers will be
(a) 4
(b) 5
(c) 7
(d) 10

Answer: (d) 10

(CH3)3 C MgBr on reaction with D2O produces
(a) (CH3)3CD
(b) (CH3)3COD
(c) (CH3)3CD
(d) (CD3)3OD

Answer: (a) (CH3)3CD

Fitting reaction can be used to prepare
(a) Toluene
(b) Acetophenon
(c) Diphenyl
(d) Chlorobenzene

Answer: (c) Diphenyl

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

Answer: (d) Ethylene glycol

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

In the following groups : O Ac (I), – O Me (II), – O SO2 Me (III), – OSO2 CF3 (IV), The order of leaving group ability is
(a) I > II > III > IV
(b) IV > III > I > II
(c) m > II > I > IV
(d) II > III > IV > I

Answer: (b) IV > III > I > II

In the reaction of p-Chlorotoluene with KNH2 in liq. NHy the major product is
(a) o-toluidine
(b) m-toluidine
(c) p-toluidine
(d) p-chloro aniline

Answer: (b) m-toluidine

The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with
(a) PCl5
(b) dry HCl in the presence of anhydrous ZnCl2
(c) SOCl2 in presence of pyridine
(d) None of these

Answer: (c) SOCl2 in presence of pyridine

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