Alcohols, Phenols, and Ethers

This is an MCQ-based quiz on Alcohol, Phenols, and Ethers.

This includes Ether, Aldehyde, Ketone, and Amine

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Dehydration of tertiary alcohols with Cu at 573 gives

Aldehydes Ketones Alkenes None of these

Molecular formula of ethers is:

CnH2n+2O CnH2nO CnH2n+1O None of these

Williamson’s synthesis is an example of:

Nucleophilic substitution reaction Nucleophilic addition Electrophilic substitution None of the above

Reaction used for the preparation of ethers is

Reimer-Tiemann reaction Williamson’s synthesis Wurtz reaction Cannizzaro reaction

The test used to distinguish alcohols from one another is known as

Hinsberg’s test 2, 4-DNP test Iodoform test Lucas Lest

The decreasing order of boiling point of the following alcohols is

3-methylbuan-2-ol > 2-methylbutan-2-ol > pentan-1-ol Pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol 2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol 2-methylbutan-2-ol > pental-1-ol > 3-methylbutan-2-ol

An unknown alcohol is treated with “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism?

Tertiary alcohol by SN2 Secondary alcohol by SN1 Tertiary alcohol by SN1 Secondary alcohol by SN2

Acid catalysed dehydration of t-butanol is faster than that of n-butanol because

Tertiary carbocation is more stable than primary carbocation

Primary carbocation is more stable than tertiary carbocation

t-butanol has a higher boiling point

Rearrangement takes place during dehydration of t- butanol

An alcohol X when treated with hot cone. H2SO4 gave an alkene Y with formula C4H8. This alkene on ozonolysis gives single product with molecular formula C2H4O. The alcohol is

Butan-1-ol,

Butan-2-ol

2-methylpropan-1-ol

2,2-dimethylbutynal-1-oI

One mole of ethyl acetate on tatment with an excess of LiAlH4 in dry ether and subsequent acidification produces

1 mole acetic acid + 1 mole ethyl alcohol 1 mole ethyl alcohol + 1 mole methyl alcohol 2 moles of ethyl alcohol 1 mole of 2-butanol

Which of the following reagents can not, be used to oxidise primary alcohols to aldehydes?

CrO3 in anhydrous medium KMnO4 in acidic medium Pyridinium chlorochromate Heat in the presence of Cu at 573 K

Which of the following alcohols will give the most stable carbocation during dehydration?

2-methyl-1-propanol 2-methyl-2-propanol 1-Butanol 2-Butanol

A compound X with the molecular formula C2H8O can be oxidised to another compound Y whose molecular formulae is C3H6O2. The compound X may be

CH3CH2OCH3 CH3CH2CHO CH3CH2CH2OH CH3CHOHCH3

1-Phenylethanol can be prepared by the reaction of benzaldehyde with

Methyl bromide

Ethyl iodide and magnesium

Methyl iodide and magnesium (Grignard reagent’s)

Methyl bromide and aluminium bromide

What is the general formula for an aliphatic alcohol? (R=alkyl group)

R-H R-OH R-CHO R-COOH

Which of the following is true regarding polyhydric alcohols?

It should have one or more OH groups It should have two or more OH groups It should have three or more OH groups It should have more than four OH groups

Which of the following types of alcohol contain a bond between sp2 hybridised carbon and OH group?

Primary allylic alcohols Secondary allylic alcohols Tertiary allylic alcohols Vinylic alcohols

Which of the following terms does not describe CH2=CH-CH2OH?

Primary Monohydric Allylic Vinylic

Which of the following is not a vinylic alcohol?

CH2=CH-OH HO-CH=CH-CH3 CH2=CH-CH2-OH CH3-CH2-CH=CH-OH

Propanone on reaction with alkyl magnesium bromide followed by hydrolysis will produce

Primary alcohol

Secondary alcohol

Tertiary alcohol

Carboxylic acid

Quiz/Test Summary