Chapter 11 Alcohols, Phenols, and Ethers MCQs
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 ,
CH3CH2CH2–OH \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