Alcohols, Phenols and Ethers Chapter-Wise Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which reagent converts pentan-1-ol to pentanoic acid?

Pentan-1-ol (\( \ce{CH3(CH2)3CH2OH} \)), a primary alcohol, is oxidized to pentanoic acid (\( \ce{CH3(CH2)3COOH} \)) using a strong oxidizing agent like \( \ce{KMnO4} \).

\( \ce{NaBH4} \)
PCC
\( \ce{KMnO4} \)
\( \ce{Br2} \)
3

Which reaction demonstrates the acidic nature of phenol?

Phenol reacts with \( \ce{NaOH} \) to form sodium phenoxide (\( \ce{C6H5ONa} \)) and water, indicating its acidic nature due to the stabilization of the phenoxide ion by resonance.

Reaction with \( \ce{Br2} \)
Reaction with \( \ce{CHCl3} \)
Reaction with \( \ce{NaOH} \)
Reaction with \( \ce{H2SO4} \)
3

Which of the following alcohols gives a negative iodoform test?

Butan-1-ol (\( \ce{CH3CH2CH2CH2OH} \)) oxidizes to butanal, which lacks the \( \ce{CH3CO-} \) or \( \ce{CH3CH(OH)-} \) structure, giving a negative iodoform test.

\( \ce{CH3CH(OH)CH3} \)
\( \ce{CH3CH2OH} \)
\( \ce{CH3CH2CH2CH2OH} \)
\( \ce{CH3CH(OH)CH2CH3} \)
3

What is the common name of \( \ce{CH2OH-CHOH-CH2OH} \)?

\( \ce{CH2OH-CHOH-CH2OH} \) is a trihydric alcohol with three -OH groups on a 3-carbon chain, commonly known as glycerol.

Ethylene glycol
Propylene glycol
Isopropyl alcohol
Glycerol
4

Which alcohol is produced when methyl magnesium bromide reacts with propanal followed by hydrolysis?

Methyl magnesium bromide (\( \ce{CH3MgBr} \)) reacts with propanal (\( \ce{CH3CH2CHO} \)), adding the methyl group to the carbonyl, yielding butan-2-ol (\( \ce{CH3CH(OH)CH2CH3} \)) after hydrolysis.

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

Which phenol derivative turns yellow on exposure to air due to oxidation?

Phenol (\( \ce{C6H5OH} \)) oxidizes in air to form quinones and other colored products, turning yellow or brown, a property not typical of aliphatic alcohols.

\( \ce{C6H5OH} \)
2-Nitrophenol
4-Nitrophenol
2,4,6-Trinitrophenol
1

Which reagent dehydrates propan-2-ol to propene?

Propan-2-ol (\( \ce{CH3CH(OH)CH3} \)) is dehydrated to propene (\( \ce{CH3CH=CH2} \)) using concentrated \( \ce{H2SO4} \) at 170°C, following an E1 mechanism.

\( \ce{NaBH4} \)
PCC
\( \ce{KMnO4} \)
Conc. \( \ce{H2SO4} \)
4

Which alcohol is produced when 1-butene reacts with \( \ce{BH3} \) followed by \( \ce{H2O2} \) and \( \ce{OH-} \)?

1-Butene (\( \ce{CH2=CHCH2CH3} \)) undergoes hydroboration-oxidation, adding -OH anti-Markovnikov to form butan-1-ol (\( \ce{CH3CH2CH2CH2OH} \)).

\( \ce{CH3CH(OH)CH2CH3} \)
\( \ce{(CH3)2CHCH2OH} \)
\( \ce{CH3CH2CH2CH2OH} \)
\( \ce{CH3CH2CH(OH)CH3} \)
3

What is the product when pentan-3-ol is oxidized with PCC?

Pentan-3-ol (\( \ce{CH3CH2CH(OH)CH2CH3} \)), a secondary alcohol, is oxidized to pentan-3-one (\( \ce{CH3CH2COCH2CH3} \)) with PCC.

Pentanal
Pentan-2-one
Pentanoic acid
Pentan-3-one
4

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

The longest chain is propane with two methyl groups on the second carbon, where the -OH is attached, named 2-methylpropan-2-ol.

Butan-2-ol
Propan-2-ol
2-Methylpropan-1-ol
2-Methylpropan-2-ol
4

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