Alcohols, Phenols and Ethers Chapter-Wise Test 2

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What is the product when benzyl alcohol is oxidized with \( \ce{KMnO4} \)?

Benzaldehyde
Benzoic acid
Benzene
Phenol
2

Benzyl alcohol is oxidized by strong oxidizing agents like \( \ce{KMnO4} \) to benzoic acid.

What is the major product of acid dehydration of butan-2-ol?

But-1-ene
Butane
Butanal
But-2-ene
4

Dehydration of butan-2-ol gives a mixture of alkenes, with but-2-ene as the major product according to Saytzeff’s rule.

What is the IUPAC name of \( \ce{CH3-CH2-CH(OH)-CH2-OH} \)?

The compound has a 4-carbon chain with -OH groups on carbons 1 and 3, named butane-1,3-diol in IUPAC nomenclature.

Butane-1,2-diol
Butane-2,3-diol
Propane-1,3-diol
Butane-1,3-diol
4

Which alcohol has the highest solubility in water among the following?

Propane-1,2-diol (\( \ce{CH3CH(OH)CH2OH} \)) has two -OH groups, enhancing hydrogen bonding with water, making it more soluble than monohydric alcohols like propan-1-ol.

\( \ce{CH3CH2CH2CH2OH} \)
\( \ce{CH3CH(OH)CH2OH} \)
\( \ce{CH3CH2CH2OH} \)
\( \ce{(CH3)2CHCH2OH} \)
2

What is the common name of \( \ce{CH3CH(OH)CH2OH} \)?

\( \ce{CH3CH(OH)CH2OH} \) (propane-1,2-diol) is commonly known as propylene glycol, a widely used diol.

Ethylene glycol
Glycerol
Isopropyl alcohol
Propylene glycol
4

Which alcohol is produced by the acid-catalyzed hydration of 1-butene?

1-Butene (\( \ce{CH2=CH-CH2-CH3} \)) undergoes acid-catalyzed hydration with \( \ce{H2SO4} \) and \( \ce{H2O} \), following Markovnikov’s rule, to form butan-2-ol (\( \ce{CH3CH(OH)CH2CH3} \)).

\( \ce{CH3CH(OH)CH2CH3} \)
\( \ce{CH3CH2CH2CH2OH} \)
\( \ce{(CH3)2CHCH2OH} \)
\( \ce{CH3CH2OH} \)
1

What is the IUPAC name of the compound \( \ce{CH3-CH(OH)-CH2-CH3} \)?

The longest chain containing the -OH group has 4 carbons, so the base name is butane. The -OH is on the second carbon from the end nearest to it, so it is butan-2-ol.

Butan-2-ol
Butan-1-ol
2-Methylpropan-1-ol
Propan-2-ol
1

Which reagent produces a ketone from a secondary alcohol without forming an acid?

PCC oxidizes secondary alcohols to ketones selectively, stopping at the ketone stage without further oxidation to a carboxylic acid.

\( \ce{KMnO4} \)
\( \ce{NaBH4} \)
PCC
Conc. \( \ce{H2SO4} \)
3

What is the IUPAC name of \( \ce{CH3-CH(OH)-CH2-CH2-OH} \)?

The compound has a 4-carbon chain with -OH groups on carbons 1 and 3, named butane-1,3-diol in IUPAC nomenclature.

Butane-1,2-diol
Butane-1,3-diol
Propane-1,2-diol
Butane-2,3-diol
2

How is 2-methylpropan-2-ol synthesized from methyl magnesium bromide?

Methyl magnesium bromide (\( \ce{CH3MgBr} \)) reacts with acetone (\( \ce{CH3COCH3} \)), adding the methyl group to the carbonyl carbon, and hydrolysis yields 2-methylpropan-2-ol (\( \ce{(CH3)3COH} \)).

With \( \ce{HCHO} \)
With \( \ce{CH3CHO} \)
With \( \ce{CH3CH2CHO} \)
With \( \ce{CH3COCH3} \)
4

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