MCQ Questions for Class 12 Chemistry Chapter 11 Alcohols, Phenols and Ethers Part-1 with Answers

Alcohols, Phenols and Ethers Part-1 Class 12 Chemistry MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 11 Alcohols, Phenols and Ethers Part-1 with Answers Pdf free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. We have Provided Alcohols, Phenols and Ethers Part-1 Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Class 12 Chemistry Chapter 11 Quiz

Class 12 Chemistry Chapter 11 MCQ Online Test

You can refer to NCERT Solutions for Class 12 Chemistry Chapter 11 Alcohols, Phenols and Ethers Part-1 to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Alcohols, Phenols and Ethers Part-1 Class 12 Chemistry MCQ online test

Q1.	Which of the following alcohols gives 2-butenc on dehydration byconc. H₂SO₄?
	A.2-methyl propene-2-ol
	B.2-methyl 1 -propanol
	C.Butane-2-ol
	D.Butane 1-ol

Ans: Butane-2-ol

Q2.	One mole of ethyl acetate on tatment with an excess of LiAlH₄ in dry ether and subsequent acidification produces
	A.1 mole acetic acid + 1 mole ethyl alcohol
	B.1 mole ethyl alcohol + 1 mole methyl alcohol
	C.2 moles of ethyl alcohol
	D.1 mole of 2-butanol

Ans: 2 moles of ethyl alcohol

Q3.	Which of the following reagents can not, be used to oxidise primary alcohols to aldehydes?
	A.CrO₃ in anhydrous medium
	B.KMnO₄ in acidic medium
	C.Pyridinium chlorochromate
	D.Heat in the presence of Cu at 573 K

Ans: KMnO₄ in acidic medium

Q4.	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

Ans: methyl iodide and magnesium (Grignard reagent’s)

Q5.	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

Ans: 2-methyl-2-propanol

Q6.	A compound X with the molecular formula C₂H₈O can be oxidised to another compound Y whose molecular formulae is C₃H₆O₂. The compound X may be
	A.CH₃CH₂OCH₃
	B.CH₃CH₂CHO
	C.CH₃CH₂CH₂OH
	D.CH₃CHOHCH₃

Ans: CH₃CH₂CH₂OH

Q7.	Order of esterification of alcohols are
	A.3° > 1° > 2°
	B.2°> 3° > 1°
	C.1 ° > 2° > 3°
	D.None of these

Ans: 1 ° > 2° > 3°

Q8.	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

Ans: 2-methylpropene is formed

Q9.	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

Ans: 2-methylpropanal and isopropyl magnesium iodide

Q10.	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

Ans: Pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol

Q11.	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

Ans: tertiary carbocation is more stable than primary carbocation

Q12.	An unknown alcohol is treated with “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism?
	A.Tertiary alcohol by S_N²
	B.Secondary alcohol by S_N¹
	C.Tertiary alcohol by S_N¹
	D.Secondary alcohol by S_N²

Ans: Tertiary alcohol by S_N¹

Q13.	An alcohol X when treated with hot cone. H₂SO₄ gave an alkene Y with formula C₄H₈. This alkene on ozonolysis gives single product with molecular formula C₂H₄O. The alcohol is
	A.butan-1-ol,
	B.butan-2-ol
	C.2-methylpropan-1-ol
	D.2,2-dimethylbutynal-1-oI

Ans: butan-2-ol

Q14.	Propanone on reaction with alkyl magnesium bromide followed by hydrolysis will produce
	A.primary alcohol
	B.secondary alcohol
	C.tertiary alcohol
	D.carboxylic acid

Ans: tertiary alcohol

Q15.	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

Ans: tertiary alcohol

Q16.	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

Ans: 2, 4, 6-tribromophenol

Q17.	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

Ans: 2, 4, 6-trinitropheriol

Q18.	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

Ans: o-nitrophenol shows intramolecular H-bonding

Q19.	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