MCQ Questions for Class 12 Chemistry Chapter 11 Alcohols, Phenols and Ethers with Answers


Check the below NCERT MCQ Questions for Class 11 Chemistry with Answers Pdf free download. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well.


Q.1 Dehydration of tertiary alcohols with Cu at 573 gives

(a) Aldehydes
(b) Ketones
(c) Alkenes
(d) None of these

(c) Alkenes


Q.2 1-Phenylethanol can be prepared by the reaction of benzaldehyde with

(a) methyl bromide
(b) ethyl iodide and magnesium
(c) methyl iodide and magnesium (Grignard reagent’s)
(d) methyl bromide and aluminium bromide

(c) methyl iodide and magnesium (Grignard reagent’s)


Q.3 Which of the following alcohols will give the most stable carbocation during dehydration?

(a) 2-methyl-1-propanol
(b) 2-methyl-2-propanol
(c) 1-Butanol
(d) 2-Butanol

(b) 2-methyl-2-propanol


Q.4 What happens when tertiary butyl alcohol is passed over heated copper at 300°C?

(a) Secondary butyl alcohol is formed
(b) 2-methylpropene is formed
(c) 1-butene is formed
(d) Butanol is formed

(b) 2-methylpropene is formed


Q.5 What would be the reactant and reagent used to obtain 2, 4-dimenthyl pentan-3-ol?

(a) Propanal and propyl magnesium bromide
(b) 3-methylbutanal and 2-methyl magnesium iodide
(c) 2-dimethylpropanone and methyl magnesium odide
(d) 2-methylpropanal and isopropyl magnesium iodide

(d) 2-methylpropanal and isopropyl magnesium iodide


Q.6 Williamson’s synthesis is an example of:

(a) Nucleophilic substitution reaction
(b) Nucleophilic addition
(c) Electrophilic substitution
(d) None of the above

(a) Nucleophilic substitution reaction


Q.7 Reaction used for the preparation of ethers is

(a) Reimer-Tiemann reaction
(b) Williamson’s synthesis
(c) Wurtz reaction
(d) Cannizzaro reaction

(b) Williamson’s synthesis


Q.8 The test used to distinguish alcohols from one another is known as

(a) Hinsberg’s test
(b) 2, 4-DNP test
(c) Iodoform test
(d) Lucas Lest

(d) Lucas Lest


Q.9 The decreasing order of boiling point of the following alcohols is

(a) 3-methylbuan-2-ol > 2-methylbutan-2-ol > pentan-1-ol
(b) Pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol
(c) 2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol
(d) 2-methylbutan-2-ol > pental-1-ol > 3-methylbutan-2-ol

(b) Pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol


Q.10 Acid catalysed dehydration of t-butanol is faster than that of n-butanol because

(a) tertiary carbocation is more stable than primary carbocation
(b) primary carbocation is more stable than tertiary carbocation
(c) t-butanol has a higher boiling point
(d) rearrangement takes place during dehydration of t- butanol

(a) tertiary carbocation is more stable than primary carbocation


Q.11 Propanone on reaction with alkyl magnesium bromide followed by hydrolysis will produce

(a) primary alcohol
(b) secondary alcohol
(c) tertiary alcohol
(d) carboxylic acid

(c) tertiary alcohol


Q.12 Vapours of an alcohol X when passed over hot reduced copper, produce an alkene, the alcohol is

(a) primary alcohol
(b) secondary alcohol
(c) tertiary alcohol
(d) dihydric alcohol

(c) tertiary alcohol


Q.13 Phenol when treated with excess of bromine water gives a white precipitate of

(a) 2, 4, 6-tribromophenol
(b) o-bromophenol
(c) p-bromophenol
(d) bromobenzene

(a) 2, 4, 6-tribromophenol


Q.14 Ethers on hydrolysis give

(a) carboxylic acid
(b) alcohol
(c) ester
(d) ketone

(b) alcohol


Q.15 Which of the following has highest boiling point?

(a) Methanol
(b) Ethanol
(c) Propan-1 -ol
(d) Butan-1-ol

(d) Butan-1-ol


Q.16 Picricacid is a yellow coloured compound. Its chemical name is

(a) m-nitrobenzoic acid
(b) 2, 4, 6-trinitropheriol
(c) 2, 4, 6-tribromophenol
(d) p-nitrophenol

(b) 2, 4, 6-trinitropheriol


Q.17 Ortho-nitrophenol is less soluble in water than, p- and m- nitrophenols because

(a) o-nitrophenol shows intramolecular H-bonding
(b) o-nitrophenol shows intermolecular H-bonding
(c) melting point of o-nitrophenol is lower than those of m- and p-isomers
(d) o-nitrophenol is more volatile in steam than those of m- and p-isomers

(a) o-nitrophenol shows intramolecular H-bonding


Q.18 The best reagent to convert pent-3-en-2-ol into pent-3-en- 2-one is

(a) acidic permanganate
(b) acidic dichromate
(c) chromic anhydride in glacial acetic acid
(d) pyridiriium chlorochromate

(d) pyridiriium chlorochromate


Q.19 Which of the following is most acidic?

(a) Benzyl alcohol
(b) Cyclohexanol
(c) Phenol
(d) m-Chlorophenol

(d) m-Chlorophenol


Q.20 Methanol and ethanol can be distinguished by using

(a) Fehling’s test
(b) Iodoform test
(c) Tollen’s test
(d) Carbylamine test

(b) Iodoform test


Q.21 The reaction between phenol and chloroform in the presence of aqueous NaOH is

(a) nucleophilic substitution reaction
(b) electrophilic addition reaction
(c) electrophilic substitution reaction
(d) nucleophilic addition reaction

(c) electrophilic substitution reaction


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