Chemistry Alcohols, Phenols and Ethers MCQs Chapter 11 Class 12

Created on February 10, 2022 By Ali Durrani

Chemistry Ch 11 Class 12 Alcohols, Phenols and Ethers

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1 / 77

Propane-1 of when combines with FICI In the presence of ZnCl2, It gives:

1- Clifiropropane

2- Chloropropane

Dichloropropane

1-Cholropropene

2 / 77

Methylated spirit Is % methanol and % ethanol:

5 and 95

20 and 80

60 and 40

50 and 50

3 / 77

Phenol reacts with calcium carbonate and evolve ________?

PMC Practice 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) H2 gas

B) CO2 gas

C) O2

D) None of these

4 / 77

The method which is used on an industrial scale for production of alcohol from alkene is:

PreMedPK MDCAT Mock 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Hydrohalogenation of alkenes

B) Dehydration of alkenes

C) Hydration of alkenes

D) Hydroxylation of alkenes

5 / 77

In which of the following reaction does the C-O bond of alcohol not break?

PreMedPK MDCAT Mock 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Reaction with SOCl2

B) Dehydration

C) Esterification

D) All of these options are correct

6 / 77

Which of the following compounds will give a secondary alcohol after reaction with NaBH4?

PreMedPK MDCAT Mock 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) CH3COCH3

B) CH3COOCH3

C) CH3CH2CHO

D) CH3CH2COOH

7 / 77

Alkyl groups In ethers are connected by?

An oxygen atom

A carbon atom

A nitrogen atom

A benzene ring

8 / 77

Which is more soluble in ethanol?

chlorine

Calcium carbonate

Potassium chloride

Propane

9 / 77

By fermentation process of starch and by the catalytic enzyme, ______ is produced.

NUMS 2018
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Methyl alcohol

B) Ethyl alcohol

C) Acetyl alcohol

D) Methanal

10 / 77

Which of following is an example of electrophilic attack on alcohols?

PreMedPK MDCAT Mock 5
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) C2H5OH + CH3COOH → CH3COOC2H5 + H2O

B) 2C2H5OH+2Na→ 2CH5ONa+H2

C) C2H5OH + HCl → C2H5Cl + H2O

D) Both A and B

11 / 77

Which of the following process is not use for the preparation of alcohol?

Reaction of alkyl halide with Grignard reagent

Hydration of alkene

Reaction of Grignard reagent from aldehyde

From water gas

12 / 77

Boiling point of C2H5OH is high than phenol because:

Of Its stability

Presence of intermolecular H-bond

Both a & b

Its flammable

13 / 77

Which of the following is an insecticide?

PreMedPK MDCAT Mock 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) DDT

B) Teflon

C) Iodoform

D) Dynamite

14 / 77

Phenol is reduced to benzene on reaction with:

Zn

NaOH

KMnO4

HO

15 / 77

Melting point of methyl alcohol is?

-97.6 'C

-37.6 'C

-64.7'C

-94.6'C

16 / 77

The strongest acid among the following is?

PreMedPK MDCAT Mock 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Carbolic acid

B) H2O

C) Methanol

D) Butanoic acid

17 / 77

Methyl alcohol is used for production of

Dyes

Drugs

Perfumes

Antifreeze

18 / 77

In Lucas test, tertiary alcohols form oily layer of alkyl halid ___ ?

PreMedPK MDCAT Mock 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) On heating

B) Immediately

C) After 5-10 minutes

D) After 20 minutes

19 / 77

Which of the following is more soluble in water?

PMC Sample 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Ethanol

B) Phenol

C) Hexanol

D) Dimethyl ether

20 / 77

Which of the following is TRUE regarding Methyl Alcohol?

PreMedPK MDCAT Mock 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) It is a colorless, volatile, thin liquid with specific gravity 0.796 at 15°C

B) It is used for low-temperature thermometers and as a fuel substitute

C) It is extensively used in the formation of different beverages

D) It is used as a base for perfumes

21 / 77

14) Ethanol and Methanol can be separated by:

Cannizzaro's reaction

Iodoform test

b) Lucas Test

Tolien's test

22 / 77

The classification of monohydric alcohols is due to

PMC Sample 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) hydrogen atom

B) carbon atom

C) hydroxyl group

D) carbonyle group

23 / 77

Rectified spirits have a percentage of alcohol.

NUMS 2018
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) 12 %

B) 24 %

C) 95 %

D) 100 %

24 / 77

Which of the following is not a physical property of ethers?

NUMS 2019 Cancelled
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) They are usually volatile liquids

B) Show weak hydrogen bonding

C) They are highly flammable with low boiling points

D) It is poisonous and is used as a disinfectant in hospitals

25 / 77

Why is it necessary to distill aldehyde formed from oxidation of primary alcohol through acidified potassium dichromate (VI) solution or acidified sodium dichromate (VI) solution?

PreMedPK MDCAT Mock 5
Chemistry
Alcohols, Phenols and Ethers
Aldehydes and Ketones
Elimination Tool:

A) Aldehyde formed may be oxidized further to carboxylic acid concerned

B) Aldehyde formed is unstable and decompose back to original precursor i.e. primary alcohol

C) Aldehyde may be oxidised further to a ketone

D) Aldehyde formed may react with primary alcohol, the original reactant.

26 / 77

Which of the following esters give a Jasmine Flavour?

PreMedPK MDCAT Mock 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Ethyl Acetate

B) Octyl Acetate

C) Amyl Butyrate

D) Benzyl Acetate

27 / 77

Which of the following alcohol does not get oxidized when it reacts with K₂Cr₂O₇/H₂SO₄?

PMC Sample 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) CH₃C(CH₃)₂OH

B) CH₃CH(CH₃)OH

C) CH₃OH

D) C₂H₅OH

28 / 77

When an electrophilic reagent attacks on alcohol, ________.

PreMedPK MDCAT Mock 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) O – H bond formed.

B) O – H bond breaks.

C) C – O bond breaks.

D) Rise in boiling point.

29 / 77

The product formed by acid catalysed hydration of 2 – phenyl propene is:

NUMS 2018
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) 3 – phenyl – 2 – propanol

B) 2 – phenyl – 2 – propanol

C) 1 – phenyl – 1 – propanol

D) 1 – phenyl – 2- propanol

30 / 77

The method which is used on an industrial scale for production of alcohol from alkene is:

PMC Sample 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Hydrohalogenation of alkenes

B) Dehydration of alkenes

C) Hydration of alkenes

D) Hydroxylation of alkenes

31 / 77

Boiling point of Ethyl Alcohol is?

20.2 C

100 C

80.1 C

78.3 C

32 / 77

The test used to distinguish among primary, secondary, and tertiary alcohols is:

NUMS 2017
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) 2,4 – DNPH test

B) Tollens test

C) Lucas Test

D) Fehling solution test

33 / 77

The compound ‘leaf alcohol’ is partly responsible for the smell of new – mown grass

CH3CH2CH=CHCH2CH2OH

Leaf alcohol

Which two compounds will be formed when ‘leaf alcohol’ is oxidized using hot, concentrated manganate (VII) ions?

PreMedPK MDCAT Mock 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) CH3CO2H and HOCH2CH2CH2CO2H

B) CH3CO2H and HO2CCH2CH2CO2H

C) CH3CH2CO2H and HO2CCH2CO2H

D) CH3CH2CO2H and HOCH2CH2CO2H

34 / 77

Higher order alcohols

Have more than 1 carbon

have more than 3 carbons

Have more than 2 carbons

Have more than 4 carbons

35 / 77

The alkenes can be formed by alcohols in the presence of

PMC Sample 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) acidified KMnO4

B) acidified K2Cr2O7

C) acidified Cucl2

D) pyridine

36 / 77

Which of the following catalyst is used in the industrial preparation of methanol?

PreMedPK MDCAT Mock 5
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Zinc oxide and alumina

B) Alumina and silica

C) Silica and chromium oxide

D) Zinc oxide and chromium oxide

37 / 77

The alcohols in which the carbon which is attach to the OH group is further attach with two carbon atoms is called as?

PMC Sample 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Primary alcohols

B) Secondary alcohols

C) Tertiary alcohols

D) None of these

38 / 77

The strength of an acid depends on?

PreMedPK MDCAT Mock 5
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Ease of removal of proton.

B) Stability of the anion formed.

C) Stability of the cation formed.

D) Depends on both ease of removal of proton and stability of the anion formed.

39 / 77

Which of the following is not a physical property of ethers?

PreMedPK MDCAT Mock 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) They are usually volatile liquids

B) Show weak hydrogen bonding

C) They are highly flammable with low boiling points

D) It is poisonous and is used as a disinfectant in hospitals

40 / 77

phenol, and ethers are the derivatives of?

Carboxylic acid

Alkenes

Organic derivatives of water

Benzene

41 / 77

Phenol Acts as

Mild agent

Reducing agent

Oxidizing agent

All of the above

42 / 77

Which of the following compounds are added to ethanol to make it unfit for drinking?

PreMedPK MDCAT Mock 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Pyridine

B) Methanol

C) Acetone

D) All of these options are correct

43 / 77

Which of the following is not a derivative of benzene?

PMC Practice 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Pyrrole

B) Furan

C) Thiophene

D) All

44 / 77

Which of the following is not soluble In alcohol?

Resins and varnishes

Soaps and varnishes

Rubbers and plastics

Dyes and drug'

45 / 77

Ethers are very good:

Solvent

Oxidizing agen

Reducing agent

Dehydrating agent

46 / 77

Which of the following are not usually named using IUPAC system?

Alkenes

Alkalies

Ether

Alcohols

47 / 77

Which of following is an example of electrophilic attack on alcohols?

PMC Practice 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) C2H5OH + CH3COOH → CH3COOC2H5 + H2O

B) 2C2H5OH+2Na→ 2CH5ONa+H2

C) C2H5OH + HCl → C2H5Cl + H2O

D) Both A and B

48 / 77

Primary Alcohol is produced by reactions of Grignard’s reagent with _________ followed by hydrolysis in an acidic medium.

PreMedPK MDCAT Mock 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Carbon dioxide

B) Formaldehyde

C) Acetaldehyde

D) Ketone

49 / 77

2-methyl 2-propanol is:

Secondary butyl alcohol

Tertiary butyl alcohol

Primary butyl alcohol

Quaternary butyl alcohol

50 / 77

The aromatic compound having the functional group “OH” attached to It Is?

Carbolic acid

Phenol

Alcohol

None

51 / 77

Primary Alcohol is produced by reactions of Grignard’s reagent with _________ followed by hydrolysis in an acidic medium.

NTS 2011
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Carbon dioxide

B) Formaldehyde

C) Acetaldehyde

D) Ketone

52 / 77

Phenol reacts with CH3COCl to give:

NUMS 2019 Reconduct
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Acid

B) Ester

C) Alcohol

D) Aldehyde

53 / 77

Primary, Secondary Tertiary alcohols can be distinguished by Lucas test in which .. appear

oily Layer

Brown color

Both a and b

None of these

54 / 77

Which of the following compounds will give a secondary alcohol after reaction with NaBH4?

UHS 2019
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) CH3COCH3

B) CH3COOCH3

C) CH3CH2CHO

D) CH3CH2COOH

55 / 77

Alkoxicies react with alkyl halide to form? a

Ether

Ester

Carboxylic acid

alcohol

56 / 77

Which of following has “higher boiling”and “melting point”?

PreMedPK MDCAT Mock 5
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Acetone

B) 2 – Butanol

C) Propane

D) 2 – Methylpropene

57 / 77

Which of the following reactions is used for the production of alcohols on industrial scale?

PreMedPK MDCAT Mock 5
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Hydrogenation of alkenes

B) Hydration of alkenes

C) Hydrohalogenation of alkenes

D) Hydroxylation of alkenes

58 / 77

Ethanol, when reacted with PCI5 , gave A, POCl3, and HCI. A reacts with AgNO2 to form B and AgCl. A and B are respectively:

NTS 2014
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) C2H5Cl and C2H5OC2H5

B) C2H6 and C2H5OC2H5

C) C2H5Cl and C2H5NO2

D) C2H6 and C2H5NO2

59 / 77

Phenol has all characters except?

Can be reduced to benzene

Insoluble in water

Acidic in nature

Used as a disinfectant

60 / 77

) Melting point of methyl alcohol is:

-97 C

-89 C

-100 C

-23 C

61 / 77

The test used to distinguish among primary, secondary, and tertiary alcohols is:

PreMedPK MDCAT Mock 4
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) 2,4 – DNPH test

B) Tollens test

C) Lucas Test

D) Fehling solution test

62 / 77

Either Is dangerous In which of the following states?

Humid

Wet

dry

Hot

63 / 77

In Cannizzaro’s reaction, Benzyl alcohol is obtained from?

PreMedPK MDCAT Mock 4
Chemistry
Alcohols, Phenols and Ethers
Aldehydes and Ketones
Elimination Tool:

A) benzaldehyde

B) benzene

C) picric acid

D) benzyl chloride

64 / 77

IUPAC name of wood spirit is

Ethanol

Methanol

Propanol

None of these

65 / 77

Phenol is a(n) ________ liquid?

PMC Sample 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Dense

B) Hard

C) Deliquescent

D) Intermittent

66 / 77

Which of the following reactions is used for the production of alcohols on industrial scale?

UHS 2019
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Hydrogenation of alkenes

B) Hydration of alkenes

C) Hydrohalogenation of alkenes

D) Hydroxylation of alkenes

67 / 77

The compound ‘leaf alcohol’ is partly responsible for the smell of new – mown grass

CH3CH2CH=CHCH2CH2OH

Leaf alcohol

Which two compounds will be formed when ‘leaf alcohol’ is oxidized using hot, concentrated manganate (VII) ions?

NUMS 2018
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) CH3CO2H and HOCH2CH2CH2CO2H

B) CH3CO2H and HO2CCH2CH2CO2H

C) CH3CH2CO2H and HO2CCH2CO2H

D) CH3CH2CO2H and HOCH2CH2CO2H

68 / 77

The reactivity of alcohol when 0-H bonds break

Tertiary Alcohol < Secondary Alcohol < Primary Alcohol

Primary Alcohol > Secondary Alcohol > Tertiary Alcohol

Primary Alcohol > Secondary Alcohol < Tertiary Alcohol

Tertiary Alcohol > Primary Alcohol > Secondary Alcohol

69 / 77

Phenol is derived from?

Benzene

Carboxylic acid

Alcohols

Aliphatic compounds

70 / 77

Which of the following is TRUE regarding Methyl Alcohol?

NTS 2011
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) It is a colorless, volatile, thin liquid with specific gravity 0.796 at 15°C

B) It is used for low-temperature thermometers and as a fuel substitute

C) It is extensively used in the formation of different beverages

D) It is used as a base for perfumes

71 / 77

25 to 35 degree centigrade temperature is good for which of the following process?

Dow's method

Preparation of formalin

Fermentation

Methanol

72 / 77

How are carboxylic acids formed from alcohol?

PMC Practice 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Hydrolysis

B) Reduction

C) Oxidation

D) Protonation

73 / 77

Dehydration of ethanol at 100 oC in the presence of concentrated H2SO4 gives:

NUMS 2019 Reconduct
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Ethene

B) Ethane

C) Ethyne

D) Ether

74 / 77

Which of the following alcohol does not get oxidized when it reacts with K₂Cr₂O₇/H₂SO₄?

PreMedPK MDCAT Mock 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) CH₃C(CH₃)₂OH

B) CH₃CH(CH₃)OH

C) CH₃OH

D) C₂H₅OH

75 / 77

The catalyst used for the formation by dehydration of alcohols ?

PreMedPK MDCAT Mock 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Concentrated HN3 at 14 C

B) Concentrated H2SO4 at 14 C

C) Hot H3PO4 at 18 C

D) ZnCl2 at 45 C

76 / 77

With which of the following alcohols do not react to form alkyl halides?

HCl

SOCl2

Br2

PCl3

77 / 77

Treatment of ethene with cold sulphuric acid, followed by reaction with boiling water, yields:

UHS 2019
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

A) Ethane

B) Ethanal

C) Ethanol

D) Ethyne

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Chemistry Alcohols, Phenols and Ethers MCQs Chapter 11 Class 12

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