JEE Chemistry Alcohols Phenols and Ethers MCQs Set A

Question. Which of the following is dihydric alcohol ?
(a) Ethylene glycol
(b) Resorcinol
(c) Glycerol
(d) Catechol

Answer: A

Question.  An example of a compound with functional group – O – is
(a) diethyl ether
(b) acetic acid
(c) methyl alcohol
(d) acetone

Answer: A

Question. Butane-2-ol is
(a) secondary alcohol
(b) aldehyde
(c) primary alcohol
(d) tertiary alcohol

Answer: A

Question. Cresol has
(a) Phenolic – OH
(b) – CHO
(c) Alcoholic – OH
(d) – COOH

Answer: A

Question. How many isomers of C₅H₁₁OH will be primary alcohols
(a) 4
(b) 3
(c) 5
(d) 2

Answer: A

Question. Number of metamers represented by molecular formula C₄H_10O is
(a) 3
(b) 4
(c) None of these
(d) 1

Answer: A

Question. How many alcohol(s) with molecular formula C₄H_10O are chiral in nature?
(a) 1
(b) 3
(c) 2
(d) 4

Answer: A

Question. IUPAC name of m-cresol is ___________
(a) 2-methylphenol
(b) 3-methoxyphenol
(c) 3-chlorophenol
(d) benzene-1, 3-diol

Answer: A

Question. Benzyl alcohol is obtained from benzaldehyde by
(a) Cannizzaro’s reaction
(b) Wurtz’s reaction
(c) Fittig’s reaction
(d) Kolbe’s reaction

Answer: A

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

Answer: A

Question. Ethyl alcohol is industrially prepared from ethylene by
(a) Absorbing in H₂SO₄ followed by hydrolysis
(b) All the three
(c) Catalytic reduction
(d) Permanganate oxidation

Answer: A

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

Answer: A

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

Answer: A

Question. Ethyl alcohol can be prepared from Grignard reagent by the reaction of
(a) HCHO
(b) RCN
(c) RCOCl
(d) R₂CO

Answer: A

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

Answer: A

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

Answer: A

Question. Which of the following reacts with NaOH to give an alcohol
(a) Methanal
(b) Butene
(c) Propene
(d) Ethanal

Answer: A

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

Answer: A

Question. Which of the following are used to convert RCHO into RCH₂OH?
(i) H₂/Pd
(ii) LiAlH₄
(iii) NaBH₄
(iv) Reaction with RMgX followed by hydrolysis
(a) (i), (ii) and (iii)
(b) (i) and (iii)
(c) (i) and (ii)
(d) (ii), (iii) and (iv)

Answer: A

Question. Commercially carboxylic acids are reduced to alcohols by converting them to the
(a) esters
(b) ketones
(c) aldehydes
(d) amines

Answer: A

Question. The correct order of boiling points for primary (1º), secondary (2º) and tertiary alcohol (3º) is
(a) 1º > 2º > 3º
(b) 2º > 1º > 3º
(c) 3º > 2º > 1º
(d) 2º > 3º > 1º

Answer: A

Question. Alcohols of low molecular weight are
(a) soluble in water
(b) soluble in water on heating
(c) insoluble in water
(d) insoluble in all solvents

Answer: A

Question. Which statement is not correct about alcohol?
(a) Alcohol of less no. of carbon atoms is less soluble in water than alcohol of more no. of carbon atoms
(b) Molecular weight of alcohol is higher than water
(c) Alcohol evaporates quickly
(d) All of the above

Answer: A

Question. Which one of the following alcohols is least soluble in water?
(a) C₁₀H₂₁OH
(b) C₃H₇OH
(c) CH₃OH
(d) None of these

Answer: A

Question. Methanol and ethanol are miscible in water due to
(a) hydrogen bonding character
(b) covalent character
(c) oxygen bonding character
(d) None of these

Answer: A

Question. If ethanol dissolves in water, then which of the following would be observed
(a) emission of heat and contraction in volume
(b) absorption of heat and increase in volume
(c) emission of heat and increase in volume
(d) absorption of heat and contraction in volume

Answer: A

Question. Which of the following is correct
(a) Alcoholic iodine gives iodoform with NaOH
(b) Sucrose on reaction with NaCl gives invert sugar
(c) Reaction of vegetable oil with H₂SO₄ gives glycerine
(d) On reduction of any aldehyde, secondary alcohol is formed

Answer: A

Question. Phenol is more acidic than alcohol because
(a) phenoxide ion is resonance stabilised
(b) None of these
(c) phenol is aromatic and alcohol is aliphatic
(d) phenol is more stable than water

Answer: A

Question. Acidity of phenol is due to
(a) resonance stabilisation of its anion
(b) benzene ring
(c) phenolic group
(d) hydrogen bonding

Answer: A

Question. The ionization constant of phenol is higher than that of ethanol because
(a) phenoxide ion is stabilized through delocalization
(b) phenoxide ion is less stable than ethoxide
(c) phenoxide ion is stronger base than ethoxide
(d) phenoxide ion is bulkier than ethoxide

Answer: A

Question. Which one of the following on oxidation gives a ketone
(a) Secondary alcohol
(b) All of these
(c) Primary alcohol
(d) Tertiary alcohol

Answer: A

Question. Primary and secondary alcohols on action of reduced copper give
(a) Aldehydes and ketones respectively
(b) Ketones and aldehydes respectively
(c) Only aldehydes
(d) Only ketones

Answer: A

Question. When ethyl alcohol reacts with acetic acid, the products formed are
(a) Ethyl acetate + water
(b) Ethyl acetate + soap
(c) Ethyl alcohol + water
(d) Sodium ethoxide + hydrogen

Answer: A

Question. Which of the following compounds is oxidised to prepare methyl ethyl ketone
(a) 2-Butanol
(b) 2-Propanol
(c) l-Butanol
(d) t-Butyl alcohol

Answer: A

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

Answer: A

Question. n-Propyl alcohol and isopropyl alcohol can be chemically distinguished by which reagent
(a) Oxidation with potassium dichromate
(b) Reduction
(c) Ozonolysis
(d) PCl₅

Answer: A

Question. Lucas reagent is
(a) Conc. HCl and anhydrous ZnCl₂
(b) Conc. HNO₃ and hydrous ZnCl₂
(c) Conc. HCl and hydrous ZnCl₂
(d) None of these

Answer: A

Question. The compound which reacts fastest with Lucas reagent at room temperature is
(a) 2-Methylpropan-2-ol
(b) Butan-2-ol
(c) Butan-1-ol
(d) 2-Methyl propan-1-ol

Answer: A

Question. When phenol is treated with excess bromine water, it gives
(a) 2, 4, 6-Tribromophenol
(b) o- and p-Bromophenol
(c) m-Bromophenol
(d) 2, 4-Dibromophenol

Answer: A

Question. When phenol is heated with CHCl₃ and alcoholic KOH when salicyladehyde is produced. This reaction is known as
(a) Reimer-Tiemann reaction
(b) Sommelet reaction
(c) Rosenmund’s reaction
(d) Friedel-Crafts reaction

Answer: A

Question. On distilling phenol with Zn dust, one gets
(a) ZnO + benzene
(b) Toluene
(c) Benzaldehyde + ZnO
(d) Benzoic acid

Answer: A

Question. Phenols do not react with one of the following
(a) Sodium bi-carbonate
(b) Sodium hydroxide
(c) Alkali metals
(d) Potassium hydroxide

Answer: A

Question. Dehydration of 2-butanol yields
(a) Both
(b) 2-butene
(c) 1-butene
(d) None of these

Answer: A

Question. To distinguish between salicylic acid and phenol, one can use
(a) NaHCO₃ solution
(b) neutral FeCl₃
(c) 5% NaOH solution
(d) bromine water

Answer: A

Question. Lucas test is done to differentiate between
(a) 1°, 2° and 3° alcohols
(b) None of these
(c) alcohol and aromatic ketones
(d) alcohol and ketone

Answer: A

Question. Ethyl alcohol exhibits acidic character on reacting it with
(a) sodium metal
(b) acetic acid
(c) hydrogen chloride
(d) acidic K₂Cr₂O₇

Answer: A

Question. Chemical name of salol is
(a) phenyl salicylate
(b) acetylsalicyclic acid
(c) sodium salicylate
(d) methyl salicylate

Answer: A

Question. Aspirin is an acetylation product of
(a) o-Hydroxybenzoic acid
(b) m-Hydroxybenzoic acid
(c) p-Dihydroxybenzene
(d) o-Dihydroxybenzene

Answer: A

Question. 3 moles of ethanol react with one mole of phosphorus tribromide to form 3 moles of bromoethane and one mole of X. Which of the following is X?
(a) H₃PO₃
(b) H₃PO₂
(c) H₃PO₄
(d) HPO₃

Answer: A

Question. Methanol and ethanol can be distinguished by the following
(a) By heating with iodine and washing soda
(b) By heating with zinc and inorganic mineral acid
(c) By reaction with caustic soda
(d) By reaction with metallic sodium

Answer: A

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

Answer: A

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

Answer: A

Question. Which of the following compounds will react with sodium hydroxide solution in water?
(a) C₆H₅OH
(b) C₂H₅OH
(c) (CH₃)₃COH
(d) None of these

Answer: A

Question. Arrange the following in increasing order of their acidity?
o–cresol(a), salicyclic acid(b), phenol(c)
(a) a < c < b
(b) b < c < a
(c) c < a < b
(d) a < b < a

Answer: A