Alcohols Phenols and Ethers NEET Questions

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    Alcohols Phenols and Ethers NEET Objective Questions for Students

    Quick Quiz

    Alcohol which gives a red color with the Victor Meyer test is :

    (A) C₂H5OH

    (B) CH3-CH(OH)-CH3

    (C) C(CH3)3OH

    (D) None of the above

    Option a – C₂H5OH

    When acetone reacts with the Grignard reagent it gives

    (A) 1° -alcohol

    (B) 2° -alcohol

    (C) 3° -alcohol

    (D) Methyl alcohol

    Option c – 3° -alcohol

    Consider the following reaction: C2H5OH + H2SO4 → Produce Among the following, which one cannot be formed as a product under any conditions?

    (A) Ethyl-hydrogen sulfate

    (B) Ethylene

    (C) Acetylene

    (D) Diethyl ether

    Option c – Acetylene

    Which of the following reactions of alcohol does not involve O – H bond breaking :

    (A) Reaction with alkali metals

    (B) Reaction with an acyl chloride

    (C) Reaction with sulphonyl chloride

    (D) Reaction with conc. sulphuric acid

    Option d – Reaction with conc. sulphuric acid

    An organic compound dissolved in dry benzene evolved hydrogen on treatment with sodium. It is

    (A) A ketone

    (B) An aldehyde

    (C) A tertiary amine

    (D) An alcohol

    Option d – An alcohol

    When ethyl alcohol reacts with acetic acid, the products formed are

    (A) Sodium ethoxide + hydrogen

    (B) Ethyl acetate + water

    (C) Ethyl acetate + soap

    (D) Ethyl alcohol + water

    Option b – Ethyl acetate + water

    Methyl alcohol reacts with phosphorus trichloride to form

    (A) Methane

    (B) Methyl chloride

    (C) Acetyl chloride

    (D) Dimethyl ether

    Option b – Methyl chloride

    The -OH group of methyl alcohol cannot be replaced by chlorine by the action of

    (A) Chlorine

    (B) Hydrogen chloride

    (C) Phosphorus trichloride

    (D) Phosphorus pentachloride

    Option a – Chlorine

    Hydrogen bonding is possible in

    (A) Ethers

    (B) Hydrocarbons

    (C) Alkanes

    (D) Alcohols

    Option d – Alcohols

    The increasing order of boiling points of 1º, 2º, 3° alcohol is

    (A) 1° 2° > 3⁰

    (B) 3° 2° > 1°

    (C) 2° > 1°> 3°

    (D) None

    Option a – 1° 2° > 3⁰

    The solubility of lower alcohols in water is due to

    (A) the Formation of hydrogen bonds between alcohol and water molecules

    (B) the Hydrophobic nature of alcohol

    (C) the Increases in boiling points

    (D) None of these

    Option a – the Formation of hydrogen bonds between alcohol and water molecules

    Conversion of CH3OH to CH3COOH can suitably be carried out with the reagent (under high-pressure conditions) :

    (A) CO2/H2SO4

    (B) CO/BF3

    (C) CO2/BF3

    (D) CO/H2SO4

    Option b – CO/BF3

    From amongst the following alcohols the one that would react fastest with conc. HCl and anhydrous is

    (A) 1-Butanol

    (B) 2-Butanol

    (C) 2-Methylpropan-2-ol

    (D) 2-Methylpropanol

    Option c – 2-Methylpropan-2-ol

    Primary amines can be converted into alkanols by reaction with

    (A) Aqueous HCI

    (B) Tilden’s reagent

    (C) NaNO2 & dil. HCI

    (D) Hypochlorous acid

    Option c – NaNO2 & dil. HCl

    Ethyl alcohol is made unfit for drinking by the addition of the following.

    (A) Potassium Cyanide

    (B) Methanol and Pyridine

    (C) Acetic acid and Pyridine

    (D) Naphthalene

    Option b – Methanol and Pyridine

    The offending substance in the liquor tragedies leading to blindness etc. is

    (A) Ethyl alcohol

    (B) Amyl alcohol

    (C) Benzyl alcohol

    (D) Methyl alcohol

    Option d – Methyl alcohol

    To whom is molasses are excellent raw material for production?

    (A) Glycerin

    (B) Urea

    (C) Alcohol

    (D) Paraffin

    Option c – Alcohol

    Which one of the following is also known as ‘wood spirit’?

    (A) Methyl alcohol

    (B) Ethyl alcohol

    (C) Ethylene glycol

    (D) Glycerol

    Option a – Methyl alcohol

    Fermentation of sugar leads to

    (A) Ethyl alcohol

    (B) Methyl alcohol

    (C) Acetic acid

    (D) Chlorophyll

    Option a – Ethyl alcohol

    Which of the following alcohols does not give a red color in the Victor Meyer test

    (A) Isobutyl alcohol

    (B) Isoamyl alcohol

    (C) Diethyl carbinol

    (D) Phenylcarbinol

    Option c – Diethyl carbinol

    Methanol and ethanol are distinguished by

    (A) Treating with Schiff’s reagent

    (B) Treating with Lucas reagent

    (C) Heating with iodine and alkali

    (D) Treating with CrO3 in dil. H₂SO4

    Option c – Heating with iodine and alkali

    The presence of -OH on adjacent carbon atoms can be detected by the reaction of the compound with

    (A) Conc. H₂SO4

    (B) Conc. HNO3

    (C) HIO4

    (D) Acidic KMnO4

    Option a – Conc. H₂SO4

    The reactivities of alcohol CH3OH, 1°, 2°, 3° towards metals follow the order :

    (A) CH3OH > 1° > 2º > 3°

    (B) 1° > 2°> 3° > CH3OH

    (C) CH3OH > 3⁰° > 2° > 1°

    (D) CH3OH > 2° > 3° > 1°

    Option a – CH3OH > 1° > 2º > 3°

    Which of the following is not expected to give ether on reaction with sodium methoxide

    (A) CH3CH2CH2Cl

    (B) CH2 = CHCH2Cl

    (C) PhCH₂Cl

    (D) CH₂ = CHCI

    Option d – CH₂ = CHCl

    The order of reactivity of the following alcohols with a given halogen acid, say HBr, is

    (A) CH3CH₂CHOHCH3 > CH3CH₂CH₂CH₂OH > (CH3)3COH

    (B) (CH3)3COH > CH3CH2CHOHCH3 > CH3CH2CH2CH2OH

    (C) CH3CH2CH2CH2OH > CH3CH₂CHOHCH3> (CH3)3COH

    (D) (CH3)3COH > CH3CH2CH2CH₂OH > CH3CH₂CHOHCH3

    Option b – (CH3)3COH > CH3CH2CHOHCH3 > CH3CH2CH2CH2OH

    Tertiary alcohols are resistant to oxidation because

    (A) They do not have a hydrogen atom

    (B) Of large +1 effect of alkyl groups

    (C) Of greater steric hindrance

    (D) All the above

    Option b – Of large +1 effect of alkyl groups

    Ethanol on heating with acetic acid in the presence of a few drops of sulphuric acid gives the smell of :

    (A) Oil of wintergreen

    (B) Oil of mustard

    (C) An ester

    (D) Oil of bitter almonds

    Option c – An ester

    A compound X with the molecular formula C3H8O can be oxidized to a compound Y with the molecular formula C3H6O2, X is most likely to be

    (A) Primary alcohol

    (B) Secondary alcohol

    (C) Aldehyde

    (D) Ketone

    Option a – Primary alcohol

    A compound is soluble in concentrated H₂SO4. It does not decolorize bromine in carbon tetrachloride but is oxidized by chromic anhydride in aq. sulphuric acid within two seconds, turning the orange solution to blue-green and then opaque. The original compound is

    (A) A primary alcohol

    (B) A tertiary alcohol

    (C) An alkene

    (D) An ether

    Option a – A primary alcohol

    The reaction of alcohol does not show cleavage of the R-O linkage

    (A) ROH + PCl5

    (B) ROH + SOCI2

    (C) ROH + HCI

    (D) ROH + Na

    Option d – ROH + Na

    Replacement of the -OH group in alcohol by -Cl cannot be carried out with

    (A) PCl5

    (B) SO2Cl2

    (C) PCl3

    (D) SOCI2

    Option b – SO2Cl2

    Which alcohol does not give a ketone on oxidation

    (A) Isopropyl alcohol

    (B) Allyl alcohol

    (C) Ethylmethylcarbinol

    (D) Methylphenylcarbinol

    Option b – Allyl alcohol

    To prepare 3-ethylpentan-3-ol, the reactants needed are

    (A) CH3CH2MgBr + CH3COCH2CH3

    (B) CH3MgBr + CH3CH2CH2COCH2CH3

    (C) CH3CH2MgBr + CH3CH2COCH2CH3

    (D) CH3CH2CH2MgBr + CH3COCH2CH3

    Option c – CH3CH2MgBr + CH3CH2COCH2CH3

    Action of HNO2 on CH3NH2 gives

    (A) CH3OH

    (B) CH3-O-CH3

    (C) CH3-O-N = O

    (D) B and C both

    Option d – B and C both

    Propene is allowed to react with HBr in the presence of benzoyl peroxide and the product is subsequently heated with aqueous KOH. The final product obtained is

    (A) 2-propanol

    (B) 1,2-propanediol

    (C) 1-propanol

    (D) 1,3-propanediol

    Option c – 1-propanol

    Which of the following sets of reactants may be used to prepare 2-Methyl-2-butanol, C2H5C(OH)(CH3)2?

    (A) 2-Butanone and methylmagnesium iodide

    (B) Propanone and ethyl magnesium iodide

    (C) Either of the above two

    (D) Propanal and isopropyl magnesium bromide

    Option c – Either of the above two

    Isopropylamine is allowed to react with NaNO2 and dilute H₂SO4 at a temperature ranging from 0°C to 5°C. The expected product is

    (A) 2-propanol

    (B) 2-propanone

    (C) 1-propanol

    (D) 2-nitropropane

    Option a – 2-propanol

    LiAlH4 converts acetic acid into

    (A) Acetaldehyde

    (B) Methane

    (C) Ethyl alcohol

    (D) Methyl alcohol

    Option c – Ethyl alcohol

    For which of the following parameters the I structural isomers C2H5OH and CH3OCH3 would be expected to have the same values? (Assume ideal behavior)

    (A) Heat of vaporization

    (B) Vapour pressure at the same temperature

    (C) Boiling points

    (D) Gaseous densities at the same temperature and pressure

    Option d – Gaseous densities at the same temperature and pressure

    When CH2=CH-COOH is reduced with LiAlH4, the compound obtained will be

    (A) CH3-CH2-CH2OH

    (B) CH3-CH2-CHO

    (C) CH3-CH2-COOH

    (D) CH2=CH-CH₂OH

    Option d – CH2=CH-CH₂OH

    The hydroboration of 2-methyl propene yields

    (A) 1° alcohol

    (B) 2° alcohol

    (C) 3° alcohol

    (D) None

    Option a – 1° alcohol

    Alkyl chloride is formed when alcohol is treated in the presence of anhydrous ZnCl2. The HCl in reactivity with respect to alcohol is: in order of

    (A) 3° >2°> 1°

    (B) 1° >2°> 3°

    (C) 2°> 1° > 3⁰

    (D) 1° > 3° > 2⁰

    Option a – 3° >2°> 1°

    The action of nitrous acid on ethyl amine gives

    (A) C2H6

    (B) C₂H5OH

    (C) NH3

    (D) Nitromethane

    Option b – C₂H5OH

    At low temperatures, phenol reacts with Br₂ in CS₂ to form …….. as a minor product.

    (A) p-bromophenol

    (B) o-bromophenol

    (C) 2,4-dibromophenol

    (D) 2,4,6-tribromophenol

    Option b – o-bromophenol

    ………. is formed when acetone is treated with sodium amalgam and water.

    (A) Ethanol

    (B) Propan-2-ol

    (C) Butan-2-ol

    (D) Propan-1-ol

    Option b – Propan-2-ol

    Which of the following has at least one OH group? (I) Salicylic acid (II) Anisole (III) Adipic acid (IV) Lactic acid (V) Vanillin (VI) Glyceraldehyde

    (A) (II) and (V)

    (B) (I), (IV), (V), and (VI)

    (C) (I) and (IV)

    (D) (I), (III), (V), and (VI)

    Option b – (I), (IV), (V), and (VI)

    The major product of acid-catalyzed dehydration of 1-methyl cyclohexanol is ………

    (A) Cyclohexene

    (B) 3-Methylcyclohexene

    (C) 2-Methylcyclohexene

    (D) 1-Methylcyclohexene

    Option d – 1-Methylcyclohexene

    What is the possible number of structural isomers of aliphatic monohydroxy alcohol consisting of a total of five carbon atoms including only one methyl group as a branch?

    (A) 2

    (B) 3

    (C) 4

    (D) 5

    Option c – 4

    In the mechanism of hydration of an alkene acid, the I presence of sulphuric electrophile involved is …….

    (A) H₂O

    (B) H3O

    (C) SO3

    (D) OH

    Option b – H3O

    Phenol in presence of sodium hydroxide reacts with chloroform to form salicylaldehyde. The reaction is known as ………

    (A) Kolbe’s reaction

    (B) Reimer-Tiemann reaction

    (C) Stephen’s reaction

    (D) Williamson synthesis

    Option b – Reimer-Tiemann reaction

    Identify the ether among the following that yields ethanol as one of the products of reaction with cold hydroiodic acid.

    (A) Methoxyethane

    (B) 1-Ethoxy-2-methylpropane

    (C) 2-Ethoxy-2-methylpropane

    (D) Ethoxybenzene

    Option c – 2-Ethoxy-2-methylpropane

    The intermolecular dehydration of ethanol at 413 K is an example of ……… reaction.

    (A) addition

    (B) elimination

    (C) rearrangement

    (D) substitution

    Option d – substitution

    Identify the CORRECT statement regarding 1-phenyl ethanol.

    (A) It is vinylic alcohol.

    (B) It is a phenol.

    (C) It is benzylic alcohol.

    (D) It is allylic alcohol.

    Option c – It is benzylic alcohol.

    The most suitable reagent for the following conversion is ……… Acetic acid → Ethanol

    (A) H₂/Raney nickel

    (B) NaBH4

    (C) LiAlH4/ether, H₂O

    (D) P₂05/heat

    Option c – LiAlH4/ether, H₂O

    Which of the following is the least acidic? (I) p-Bromophenol (II) p-Methoxyphenol (III) p-Cresol (IV) p-Hydroxybenzoic acid

    (A) (I)

    (B) (II)

    (C) (III)

    (D) (IV)

    Option b – (II)

    How many sigma bonds are present in m-cresol?

    (A) 8

    (B) 12

    (C) 15

    (D) 16

    Option d – 16

    Sorbitol has ………

    (A) four primaries and two secondary -OH groups

    (B) four secondary and two primary -OH groups

    (C) six primary -OH groups

    (D) six secondary -OH groups

    Option b – four secondary and two primary -OH groups

    Which of the following is CORRECT regarding Kolbe’s reaction?

    (A) The first step of the reaction involves the conversion of phenol to phenoxide ion.

    (B) In the second step of the reaction, the phenoxide ion undergoes aromatic nucleophilic substitution with CO₂.

    (C) At lower temperatures, 4-hydroxybenzoic acid is the major product.

    (D) At higher temperatures, 2-hydroxybenzoic acid is the major product.

    Option a – The first step of the reaction involves the conversion of phenol to phenoxide ion.

    Propanal on hydrogenation in presence of Pt forms (X). In the presence of HBF4, (X) reacts with diazomethane to give …….

    (A) methoxymethane

    (B) methoxy ethane

    (C) 1-methoxypropane

    (D) 2-methoxypropane

    Option c – 1-methoxypropane

    An organic compound on treatment with conc sulphuric acid gives an intermediate compound which on further hydrolysis gives, isopropanol. The organic compound is …….. and the process is called ……….

    (A) CH3CH₂CH₂OH; elimination

    (B) CH3CH₂CH3; dehydration

    (C) CH3CH=CH2; substitution

    (D) CH₂=CHCH3; hydration

    Option d – CH₂=CHCH3; hydration

    Chlorobenzene is heated with steam at 698 K using Ca3(PO4)2 as a catalyst to form compound (A When compound (A) is heated with zinc dust compound (B) is obtained. Identify the CORRECT statement about compound (B).

    (A) Compound (B) is a diketone.

    (B) Compound (B) is a haloarene.

    (C) Compound (B) is an aldehyde.

    (D) Compound (B) is an aromatic hydrocarbon

    Option d – Compound (B) is an aromatic hydrocarbon

    Catalytic hydrogenation of butanal yield ………

    (A) n-butane

    (B) pentan-2-ol

    (C) butan-1-ol

    (D) butanoic acid

    Option c – butan-1-ol

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