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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