JEE Chemistry Alcohols Phenols and Ethers MCQs Set A

Question:   The characteristic grouping of secondary alcohols is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) ethylene glycol
• b) dimethyl alcohol
• c) ethane glycol
• d) ethylidene alcohol

Answer:  ethylene glycol

Question: The structural formula of cyclohexanol is

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Which of the following is dihydric alcohol ?

• a) Ethylene glycol
• b) Resorcinol
• c) Glycerol
• d) Catechol

Answer: Ethylene glycol

Question:  An example of a compound with functional group – O – is

• a) diethyl ether
• b) acetic acid
• c) methyl alcohol
• d) acetone

Answer: diethyl ether

Question: Butane-2-ol is

• a) secondary alcohol
• b) aldehyde
• c) primary alcohol
• d) tertiary alcohol

Answer: secondary alcohol

Question: Cresol has

• a) Phenolic – OH
• b) – CHO
• c) Alcoholic – OH
• d) – COOH

Answer: Phenolic – OH

Question: How many isomers of C₅H₁₁OH will be primary alcohols

• a) 4
• b) 3
• c) 5
• d) 2

Answer: 4

Question:

• a) 2-methyl-2, 4-pentanediol
• b) 4-methyl-2, 4-pentanediol
• c) 1, 3, 3-trimethyl-1, 3-propanedio
• d) 1, 1-dimethyl-1, 3-butanediol

Answer: 2-methyl-2, 4-pentanediol

Question: Number of metamers represented by molecular formula C₄H_10O is

• a) 3
• b) 4
• c) None of these
• d) 1

Answer: 3

Question:

• a) B, C
• b) A, B, C, D
• c) A, D
• d) A

Answer: B, C

Question: How many alcohol(s) with molecular formula C₄H_10O are chiral in nature?

• a) 1
• b) 3
• c) 2
• d) 4

Answer: 1

Question:

• a) 5-Chlorohexane-2-ol
• b) 2-Chlorohexan-5-ol
• c) 2-Hydroxy-5-chlorohexane
• d) 2-Chloro-5-hydroxyhexane

Answer: 5-Chlorohexane-2-ol

Question: IUPAC name of m-cresol is ___________

• a) 2-methylphenol
• b) 3-methoxyphenol
• c) 3-chlorophenol
• d) benzene-1, 3-diol

Answer: 2-methylphenol

Question:

• a) 2-methoxypropane
• b) 2-methoxy-2-methylethane
• c) 1-methoxy-1-methylethane
• d) isopropylmethyl ether

Answer: 2-methoxypropane

Question:

• a) (ii) and (iii)
• b) (i) and (iv)
• c) (i) and (ii)
• d) (i), (ii) and (iv)

Answer: (ii) and (iii)

Question: In which of the following structures hydroxyl group is attached to sp² carbon atom?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the following is an example of unsymmetrical ether?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:  Which of the following will not form phenol or phenoxide ?

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

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: Cannizzaro’s reaction

More Questions..................................................

Question:

• a) Any of these
• b) Pd
• c) Ni
• d) Pt

Answer: Any of these

Question: Ethylene reacts with Baeyer’s reagent to give

• a) ethylene glycol
• b) ethane
• c) ethyl alcohol
• d) None of these

Answer: ethylene glycol

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: Absorbing in H₂SO₄ followed by hydrolysis

Question: Sodium salt of benzene sulphonic acid on fusion with caustic soda gives

• a) Phenol
• b) Benzoic acid
• c) Benzene
• d) Thiophenol

Answer: Phenol

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: secondary or tertiary alcohol

Question: Ethyl alcohol can be prepared from Grignard reagent by the reaction of

• a) HCHO
• b) RCN
• c) RCOCl
• d) R₂CO

Answer: HCHO

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: Propylene

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: hydration of alkene by alkaline KMnO₄

Question: Which of the following reacts with NaOH to give an alcohol

• a) Methanal
• b) Butene
• c) Propene
• d) Ethanal

Answer: Methanal

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: By hydroboration-oxidation

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: (i), (ii) and (iii)

Question: Commercially carboxylic acids are reduced to alcohols by converting them to the

• a) esters
• b) ketones
• c) aldehydes
• d) amines

Answer: esters

Question:  The hydrocarbon which produce phenol and acetone as a by product in the large quantity is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) N₂
• b) CO₂
• c) NH₃
• d) O₂

Answer: N₂

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: 1º > 2º > 3º

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:  soluble in water

Question: Which of the following has lowest boiling point ?

• a)

  

• b) p-Nitrophenol
• c) m-Nitrophenol
• d) Phenol

Answer:

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: Alcohol of less no. of carbon atoms is less soluble in water than alcohol of more no. of carbon atoms

Question: Which one of the following alcohols is least soluble in water?

• a) C₁₀H₂₁OH
• b) C₃H₇OH
• c) CH₃OH
• d) None of these

Answer: C₁₀H₂₁OH

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: hydrogen bonding character

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: emission of heat and contraction in volume

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: Alcoholic iodine gives iodoform with NaOH

Question: Which of the following is not true in case of reaction with heated copper at 300°C?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

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: phenoxide ion is resonance stabilised

Question: Acidity of phenol is due to

• a) resonance stabilisation of its anion
• b) benzene ring
• c) phenolic group
• d) hydrogen bonding

Answer: resonance stabilisation of its anion

Question: Which one of the following compounds has the most acidic nature?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

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: phenoxide ion is stabilized through delocalization

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: Secondary alcohol

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: Aldehydes and ketones respectively

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:  Ethyl acetate + water

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: 2-Butanol

Question:  HBr reacts fastest with

• a) 2-Methylpropene-2-ol
• b) 2-Mehtylpropan-1-ol
• c) propan-2-ol
• d) propan-1-ol

Answer: 2-Methylpropene-2-ol

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: Oxidation with potassium dichromate

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: Conc. HCl and anhydrous ZnCl₂

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: 2-Methylpropan-2-ol

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: 2, 4, 6-Tribromophenol

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: Reimer-Tiemann reaction

Question: On distilling phenol with Zn dust, one gets

• a) ZnO + benzene
• b) Toluene
• c) Benzaldehyde + ZnO
• d) Benzoic acid

Answer: ZnO + benzene

Question: Phenols do not react with one of the following

• a) Sodium bi-carbonate
• b) Sodium hydroxide
• c) Alkali metals
• d) Potassium hydroxide

Answer: Sodium bi-carbonate

Question:

• a) salicylic acid
• b) salicylic acid
• c) benzaldehyde
• d) benzoic acid

Answer: salicylic acid

Question: Dehydration of 2-butanol yields

• a) Both
• b) 2-butene
• c) 1-butene
• d) None of these

Answer: Both

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: NaHCO₃ solution

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: 1°, 2° and 3° alcohols

Question: Ethyl alcohol exhibits acidic character on reacting it with

• a) sodium metal
• b) acetic acid
• c) hydrogen chloride
• d) acidic K₂Cr₂O₇

Answer: sodium metal

Question:

• a) HI > HBr > HCl
• b) HBr > HI > HCl
• c) HI > HCl > HBr
• d) HCl > HBr > HI

Answer: HI > HBr > HCl

Question:

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: Chemical name of salol is

• a) phenyl salicylate
• b) acetylsalicyclic acid
• c) sodium salicylate
• d) methyl salicylate

Answer: phenyl salicylate

Question: Aspirin is an acetylation product of

• a) o-Hydroxybenzoic acid
• b) m-Hydroxybenzoic acid
• c) p-Dihydroxybenzene
• d) o-Dihydroxybenzene

Answer: o-Hydroxybenzoic acid

Question:  Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives

• a)

  

• b) nitrobenzene
• c) 2, 4, 6-trinitrobenzene
• d) p-nitrophenol

Answer: 

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: H₃PO₃

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: By heating with iodine and washing soda

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:  Benzyl alcohol

Question:

• a) 3° > 2° > 1°
• b) 1° > 2° > 3°
• c) 1° < 2° > 3°
• d) 3° > 1° > 2°

Answer: 3° > 2° > 1°

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: treatment with pyridinium chlorochromate

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: C₆H₅OH

Question:  Phenol is less acidic than_______________

• a)

  

• b) o-methoxyphenol
• c) ethanol
• d) o-methylphenol

Answer:

Question: Which of the following is most acidic?

• a)

  

• b) Cyclohexanol
• c) Phenol
• d) Benzyl alcohol

Answer: 

Question: Mark the correct increasing order of reactivity of the following compounds with HBr/HCl

• a) B < C < A
• b) A < B < C
• c) B < A < C
• d) C < B < A

Answer: B < C < 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 < c < b

Question:

• a) Bronsted acid
• b) Lewis base
• c) Bronsted base
• d) Lewis acid

Answer: Bronsted acid