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
(c) CH3CH2CH2CH2OH
(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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