Class 12 Chemistry MCQs Alcohols, Phenols And Ethers for JEE/NEET

Here, you will get Class 12 Chemistry MCQ of Chapter 11 Alcohols, Phenols And Ethers for cracking JEE and NEET/AIIMS. By solving these MCQs of Class 12 Chemistry Chapter 11 Alcohols, Phenols And Ethers, 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. 

Alcohols, Phenols And Ethers 12 MCQs Questions with Answers

In the reduction R — CHO + H2 → RCH2OH the catalyst used is
(a) Ni
(b) Pd
(c) Pt
(d) Any of these

Answer: (d) Any of these

Isopropyl alcohol is obtained by reacting which of the following alkenes with concentrated H2SO4 followed by boiling with H2O?
(a) Ethylene
(b) Propylene
(c) 2-Methylpropene
(d) Isoprene

Answer: (b) Propylene

Alkenes convert into alcohols by
(a) hydrolysis by dil. H2SO4
(b) hydration of alkene by alkaline KMnO4
(c) hydrolysis by water vapours and conc. HNO3
(d) hydration of alkene by aqueous KOH

Answer: (b) hydration of alkene by alkaline KMnO4

Among the following sets of reactants which one produces anisole?
(a) CH3CHO : RMgX
(b) C6H5OH; NaOH, CH3I
(c) C6H5OH, neutral FeCl3
(d) C6H5 —CH3; CH3COCl; AlCl3

Answer: (b) C6H5OH; NaOH, CH3I

During dehydration of alcohols to alkenes by heating with cone. H2SO4 the initial step is
(a) formation of an ester
(b) protonation of alcohol molecule
(c) formation of carbocation
(d) elimination of water

Answer: (b) protonation of alcohol molecule

The product of acid catalysed hydration of 2-phenylpropene is
(a) 3-Phenyl-2-propanol
(b) 1-Phenyl-2-propanol
(c) 2-phenyl-2-propanol
(d) 2-phenyl-1-propanol

Answer: (a) 3-Phenyl-2-propanol

Cyclohexene is best prepared from cyclohexanol by which of the following
(a) cone. H3PO4
(b) Cone. HCl/ZnCl2
(c) Cone. HCl
(d) Cone. HBr

Answer: (a) cone. H3PO4

Dehydration of alcohol to ethers is catalysed by
(a) cone. H2SO4 at 413 K
(b) Hot NaOH
(c) Hot HBr
(d) Hot HNO3

Answer: (a) cone. H2S04 at 413 K

Which of the following cannot be made by using Williamson Synthesis
(a) Methoxybenzene
(b) Benzyl p-nitrophenyl ether
(c) tert. butyl methyl ether
(d) Ditert. butyl ether

Answer: (d) Ditert. butyl ether

In CH3 CH2 OH, the bond that undergoes heterolytical change most readily is
(a) C-C
(b) C-O
(c) C-H
(d) O-H

Answer: (d) O-H

The compound which gives the most stable carbonium ion on dehydration is
(a) (CH3)2CHCH2OH
(b) (CH3)3COH
(d) CH3CH OH CH2 CH3

Answer: (b) (CH3)3COH

Among the following compounds, strongest acid is
(a) H-C = C-H
(b) C6H6
(c) C2H6
(d) CH3OH

Answer: (d) CH3OH

Lucas reagent is
(a) Conc. HCl and anhydrous ZnCl2
(b) Conc. HNO3 and hydrous ZnCl2
(c) Conc. HCl and hydrous ZnCl2
(d) Conc. HNO3 and anhydrous ZnCl2

Answer: (a) Conc. HCl and anhydrous ZnCl2

1-propanol and 2-propanol can be best distinguished by
(a) Oxidation with KMnO4 followed by reaction with Fehling solution.
(b) Oxidation with acidic dichromate followed by reaction with Fehling solution.
(c) Oxidation by heating with copper followed by reaction with Fehling solution.
(d) Oxidation with concentrated H2SO4 followed by reaction with Fehling solution.

Answer: (c) Oxidation by heating with copper followed by reaction with Fehling solution.

HBr reacts fastest with
(a) 2-Mehtylpropan-1-ol
(b) 2-Methylpropene-2-ol
(c) propan-2-ol
(d) propan-1-ol

Answer: (b) 2-Methylpropene-2-ol

By which of the following methods alcohol can be prepared in excellent yield?
(a) From alkenes
(b) By hydroboration-oxidation
(c) From carbonyl compounds
(d) From Grignard reagent

Answer: (b) By hydroboration-oxidation

Sodium salt of benzene sulphonic acid on fusion with caustic soda gives
(a) Benzene
(b) Phenol
(c) Thiophenol
(d) Benzoic acid

Answer: (b) Phenol

Ethylene reacts with Baeyer’s reagent to give
(a) ethane
(b) ethyl alcohol
(c) ethylene glycol
(d) None of these

Answer: (c) ethylene glycol

Acid catalyzed hydration of alkenes except ethene leads to the formation of
(a) primary alcohol
(b) secondary or tertiary alcohol
(c) mixture of primary and secondary alcohols
(d) mixture of secondary and tertiary alcohols

Answer: (b) secondary or tertiary alcohol

Which of the following reagents cannot be used to distinguish between phenol and benzyl alcohol?
(a) FeCl3
(b) Litmus soln
(c) Br2/CCl4
(d) All of these

Answer: (c) Br2/CCl4

Which compound is predominantly formed when phenol is allowed to react with bromine in aqueous medium?
(a) Picric acid
(b) O-Bromophenol
(c) 2, 4, 6-Tribromophenol
(d) p-Bromophenol

Answer: (c) 2, 4, 6-Tribromophenol

The correct order of boiling point of primary (1°), secondary (2°) and tertiary (3°) alcohols is
(a) 1° > 2° > 3°
(b) 3° > 2° > 1°
(c) 2° > 1° > 3°
(d) 2° > 3° > 1°

Answer: (a) 1° > 2° > 3°

CH3CH2OH can be converted into CH3CHO by __________ .
(a) catalytic hydrogenation
(b) treatment with LiAlH4
(c) treatment with pyridinium chlorochromate
(d) treatment with KMnO4

Answer: (c) treatment with pyridinium chlorochromate

Monochlorination of toluene in sunlight followed by hydrolysis with aq. NaOH yields
(a) o-Cresol
(b) m-Cresol
(c) 2, 4-Dihydroxytoluene
(d) Benzyl alcohol

Answer: (a) o-Cresol

The heating of phenyl methyl ether with HI produces
(a) Iodobenzene
(b) Phenol
(c) Benzene
(d) Ethyl chloride

Answer: (b) Phenol

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