Chapter 11 Alcohols, Phenols and Ethers MCQs for Class 12 Chemistry

Chapter 11 Alcohols, Phenols and Ethers MCQs for Class 12 Chemistry

Here students can practice Chapter 11 Alcohols, Phenols and Ethers MCQs for Class 12 Chemistry. All the MCQs are divided into several sub-pages. Each page has 40 MCQs, for the next page just scroll down and click on the button. Also you can practice Class 12 Chemistry MCQs (Multiple Choice Questions) for other units.

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Q 1.: Boiling point of alcohol is comparatively higher than that of corresponding alkane due to

(A) Inter-molecular hydrogen bonding

(B) Intra-molecular hydrogen bonding

(C) Volatile nature

(D) None of these

Option – A

Q 2.: HCHO is treated with reagent ‘X’. The product formed upon hydrolysis in the presence of an acid gave C2H5OH. The reagent ‘X’ is

(A) Alcoholic KOH

(B) Aqueous KOH

(C) CH3MgBr

(D) CH3CH2MgBr

Option – C

Q 3.: When phenyl magnesium bromide is reacted with ethyl alcohol, product is

(A) Benzaldehyde

(B) Benzene

(C) tert-butyl benzene

(D) Phenol

Option – B

Q 4.: Conversion of ethyl alcohol into acetaldehyde is an example of

(A) Rearrangement reaction

(B) Hydrolysis

(C) Reduction

(D) Oxidation

Option – D

Q 5.: In the reaction given below, Find ‘X’

C6H5MgBr + CH3OH → X

(A) C6H5OH

(B) C6H6

(C) C6H5OCH3

(D) CH3COOH

Option – B

Q 6.: The product obtained, on heating ethanol with conc. H2SO4 at 1650 – 1700, is

(A) (C2H5)2SO4

(B) CH3COOH

(C) CH2=CH2

(D) C2H5HSO4

Option – C

Q 7.: The major product of the following reaction is

 (CH3)2C(OH)CH2-OH  +  H2SO4  

(A) (CH3)2CH-CHO 

(B) (CH3)2C=CH2

(C) CH3COCH2CH3

(D) (CH3)2C(OH)-CHO

Option – A

Q 8.: Oxidation of organic compound ‘A’ with Na2Cr2O7 and H2SO4 gives compound ‘B’, which on reduction with H2 in the presence of Ni catalyst gives ethyl alcohol. Give the name of compound ‘A’.

(A) Ethanal

(B) Ethene

(C) Ethanoic acid

(D) Ethanol

Option – D

Q 9.: C2H5OH + SOCl2 \( \xrightarrow[]{~Pyridine~} \) X + Y + Z

In the reaction X, Y and Z respectively, are

(A) C2H4Cl , SO2 , HCl

(B) C2H5Cl , SO2 , HCl

(C) C2H5Cl , SOCl , HCl

(D) C2H4 , SO2 , Cl2

Option – B

Q 10.: Methyl alcohol when reacted with carbon monoxide using cobalt or rhodium as catalyst, compound ‘A’ is formed. On heating ‘A’ with HI in presence of red phosphorous as catalyst, ‘B’ is formed. Identify ‘B’

(A) CH3COOH

(B) CH3CHO

(C) CH3CH2-I

(D) CH3-CH3

Option – D

Q 11.: The best combination of reagent for carrying out the conversion,

R-CH2CH2-OH  → R-CH2CH2COOH , is

(A) PBr3 , KCN , H3O+

(B) PBr3 , KCN , H2/Pt

(C) KCN , H3O+

(D) PBr3 , H3O+

Option – A

Q 12.: Which of the following alcohols gives the best yield of dialkyl ether on being heated with a trace of sulphuric acid ?

(A) Pentan-2-ol

(B) 2-Methyl-Butan-2-ol

(C) Pentan-1-ol

(D) Propan-2-ol

Option – C

Q 13.: Consider the following reaction ,

CH3CH2OH  \( \xrightarrow[]{~PBr_{3}~} \) X  \( \xrightarrow[]{~Alc.KOH~}  \) Y  \( \xrightarrow[~(ii)~H_{2}O,~Heat~]{~(i)~H_{2}SO_{4},~room~temp.~} \) Z

The product ‘Z’ is

(A) CH2=CH2

(B) CH3CH2-O-CH2CH3

(C) CH3CH2-O-SO3H

(D) CH3CH2OH

Option – D

Q 14.: What will be formed after oxidation reaction of 20 alcohol with chromic acid ?

(A) Aldehyde

(B) Ketone

(C) Carboxylic acid

(D) Ester

Option – B

Q 15.: Which one of the following will most readily be dehydrated in acidic conditions ?

(A) CH3-CO-CH2– CH(OH)-CH3

(B) CH3-CH(OH)-CH2CH2CH3

(C) CH3-CO-CH(OH)-CH2CH3

(D) CH3-CO-CH2CH2-CH(OH)-CH3

Option – C

Q 16.: A fruity smell is obtained by the reaction of ethanol with

(A) CH3-CO-CH3

(B) CH3COOH

(C) CH3CHO

(D) CH3-CH2-Cl

Option – B

Q 17.: What observation will be given by the compound

(CH3)3C-CH2-OH , with Lucas reagent ?

(A) Solution becomes milky

(B) Oily drops are separated

(C) Coloured layer

(D) Reaction does not take place

Option – D

Q 18.: Which of the following is dihydric alcohol ?

(A) Ethylene glycol

(B) Glycerol

(C) Catechol

(D) Resorcinol

Option – A

Q 19.: The only alcohol that cannot be prepared by the indirect hydration of alkene is

(A) Ethyl alcohol

(B) Propyl alcohol

(C) Methyl alcohol

(D) iso-propyl alcohol

Option – C

Q 20.: Identify B in the following reaction ,

CH3CH2CH2OH  \( \xrightarrow[]{~PCl_{5}~}  \)  A  \( \xrightarrow[]{~Alc.~KOH~}  \) B

(A) Propene

(B) Propyne

(C) Propanol

(D) Propanone

Option – A

Q 21.: Which of the following compound is most acidic ?

(A) C2H6

(B) C2H4

(C) C2H2

(D) C2H5OH

Option – D

Q 22.: Which one can differentiate between C2H5OH and CH3OH ?

(A) H2O

(B) NH3

(C) Na2CO3 + I2

(D) HCl

Option – C

Q 23.: The alcohol that produce turbidity immediately with Lucas reagent at room temperature is

(A) 2-hydroxy-2-methyl propane

(B) 1-hydroxy-2-methyl propane

(C) 1-hydroxy butane

(D) 2-hydroxy butane

Option – A

Q 24.: The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one is

(A) Acidic dichromate

(B) Pyridinium chlorochromate

(C) Acidic Permanganate

(D) Chromic anhydride in glacial acetic acid

Option – B

Q 25.: When vapours of iso-propyl alcohol are passed over heated copper, the major product obtained is

(A) Propane

(B) Propylene

(C) Acetaldehyde

(D) Acetone

Option – D

Q 26.: The density of glycerol is higher than propanol due to

(A) Van der Waals’ attraction

(B) Hydrogen bonding

(C) Ionic bonding

(D) More number of covalent bonds

Option – B

Q 27.: In which form the following intermolecular hydrogen bond is not present ?

(A) Alcohol – Alcohol

(B) Alcohol – Water

(C) Ether – Ether

(D) Ether – Water

Option – C

Q 28.: By which process phenyl acetate can be converted in to hydroxy acetophenone ?

(A) Fries rearrangement

(B) Reimer-Tiemann process

(C) Kolbe’s reaction

(D) F.C.Acetylation

Option – A

Q 29.: Pick the correct group of the following having descending order of its acidity.

(A) m – nitrophenol > p – nitrophenol > o – nitrophenol

(B) o – nitrophenol > m – nitrophenol > p – nitrophenol

(C) p – nitrophenol > m – nitrophenol > o – nitrophenol

(D) p – nitrophenol > o- nitrophenol > m- nitrophenol

Option – D

Q 30.: Phenol on heating with alcoholic KOH and chloroform represent which reaction ?

(A) Fries rearrangement

(B) Reimer-Tiemann process

(C) Kolbe’s reaction

(D) F.C.Acetylation

Option – B

Q 31.: Which of the following intermediates is formed during dehydration of alcohol ?

(A) Carbocation

(B) Carboanion

(C) Free radical

(D) Both ‘B’ and ‘C’

Option – A

Q 32.: Which of the following compounds is used as analgesic drug ?

(A) Dimethyl benzoate

(B) 2-Acetyloxy benzoic acid

(C) Methyl-2-hydroxy benzoate

(D) Both ‘B’ and ‘C’

Option – D

Q 33.: Consider the following reaction,

Phenol  \( \xrightarrow[]{~Zn~dust~}  \)  X  \( \xrightarrow[Anhy.~AlCl_{3}]{CH_{3}Cl}  \)  Y  \( \xrightarrow[]{~Alk.~KMnO_{4}~} \)  Z

The product ‘Z’ is

(A) Toluene

(B) Benzoic acid

(C) Benzaldehyde

(D) Benzene

Option – B

Q 34.: Picric acid is

(A) 2,4,6-tribromophenol

(B) 2,4,6-trinitrotoluene

(C) 2,4,6-trinitrophenol

(D) None of these

Option – C

Q 35.: Which statement is incorrect ?

(A) Phenol is a weak acid

(B) Phenol is an aromatic compound

(C) Phenol liberates CO2 from Na2CO3 solution

(D) Phenol is soluble in NaOH

Option – C

Q 36.: By heating phenol with chloroform in alkali, it is converted into

(A) Salicylaldehyde

(B) Salicylic acid

(C) Anisole

(D) Phenyl benzoate

Option – A

Q 37.: The oil of winter green is

(A) Ethyl salicylate

(B) Benzaldehyde

(C) Phenyl salicylate

(D) Methyl salicylate

Option – D

Q 38.: One mole of an organic compound ‘A’ with the formula C3H8O reacts completely with two mole HI to form ‘X’ and ‘Y’. When ‘Y’ is boiled with aqueous alkali it form ‘Z’ which give iodoform test. The compound ‘A’ is

(A) Methoxy-ethane

(B) Propan-1-ol

(C) Propan-2-ol

(D) Ethoxy-ethane

Option – A

Q 39.: The major product of the reaction between tert-butyl chloride and sodium ethoxide is

(A) But-1-ene

(B) But-2-ene

(C) 2-Methylprop-1-ene

(D) 2-Ethoxy-2-methylpropane

Option – C

Q 40.: Which is not correct ?

(A) Ethane is a non-linear molecule

(B) Ethanol has lower boiling point than ethanoic acid

(C) Ethanol is less acidic that phenol

(D) Phenol is more acidic than acetic acid

Option – D

Pagination

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We hope that these Chapter 11 Alcohols, Phenols and Ethers MCQs for Class 12 Chemistry helped you in learning new concepts. All questions are based on NCERT syllabus and some of them have been asked in various competitive exams. You can go to the next pages to practice more for Chapter 11 Alcohols, Phenols and Ethers MCQs for Class 12 Chemistry, click on the question range given above.

Also you can practice Class 12 Chemistry MCQs (Multiple Choice Questions) for other units.