Alcohols, Phenols and Ethers Chapter-Wise Test 9

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What is the product when 1-phenylethanol is oxidized with \( \ce{KMnO4} \)?

1-Phenylethanol (\( \ce{C6H5CH(OH)CH3} \)), a secondary alcohol, is oxidized to acetophenone (\( \ce{C6H5COCH3} \)) with \( \ce{KMnO4} \), stopping at the ketone stage.

Benzaldehyde
Benzoic acid
Phenol
Acetophenone
4

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

\( \ce{CH3-CH(OH)-CH2-OH} \) (propane-1,2-diol) is a 3-carbon diol, commonly known as propylene glycol.

Ethylene glycol
Glycerol
Isopropyl alcohol
Propylene glycol
4

What is the key factor that makes ortho-nitrophenol more acidic than phenol?

The -NO₂ group in ortho-nitrophenol exerts a strong electron-withdrawing effect, stabilizing the phenoxide ion and increasing acidity compared to phenol.

Steric hindrance
Hydrogen bonding
Electron-withdrawing effect
Resonance in benzene ring
3

Which compound is formed when butan-1-ol is oxidized with \( \ce{KMnO4} \)?

Butan-1-ol (\( \ce{CH3CH2CH2CH2OH} \)), a primary alcohol, is oxidized to butanoic acid (\( \ce{CH3CH2CH2COOH} \)) with \( \ce{KMnO4} \), a strong oxidant.

Butanal
Butan-2-one
But-1-ene
Butanoic acid
4

Which alcohol is produced by the hydroboration-oxidation of 1-pentene?

1-Pentene (\( \ce{CH2=CH-CH2CH2CH3} \)) undergoes hydroboration-oxidation with \( \ce{BH3} \) and \( \ce{H2O2} \), adding -OH anti-Markovnikov to form pentan-1-ol (\( \ce{CH3(CH2)3CH2OH} \)).

Pentan-2-ol
2-Methylbutan-1-ol
Pentan-1-ol
Pentan-3-ol
3

Which alcohol can be prepared from an alkene using \( \ce{BH3} \) followed by \( \ce{H2O2} \) and \( \ce{OH-} \)?

Hydroboration-oxidation of propene (\( \ce{CH3-CH=CH2} \)) follows anti-Markovnikov addition, yielding propan-1-ol (\( \ce{CH3-CH2-CH2OH} \)).

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

Which compound is formed when propan-1-ol is oxidized with \( \ce{KMnO4} \)?

Propan-1-ol (\( \ce{CH3CH2CH2OH} \)), a primary alcohol, is oxidized to propanoic acid (\( \ce{CH3CH2COOH} \)) with \( \ce{KMnO4} \), a strong oxidizing agent.

Propanal
Propan-2-ol
Propene
Propanoic acid
4

Which compound is formed when phenol reacts with \( \ce{NaOH} \)?

Phenol (\( \ce{C6H5OH} \)) reacts with \( \ce{NaOH} \) to form sodium phenoxide (\( \ce{C6H5ONa} \)), demonstrating its acidic nature.

Benzene
Sodium phenoxide
Phenol sodium
Sodium benzoate
2

What is the product when pentan-3-ol is dehydrated with conc. \( \ce{H2SO4} \)?

Pentan-3-ol (\( \ce{CH3CH2CH(OH)CH2CH3} \)) dehydrates to pent-2-ene (\( \ce{CH3CH=CHCH2CH3} \)) as the major product with conc. \( \ce{H2SO4} \), following Saytzeff’s rule.

Pent-1-ene
Pent-2-ene
Pentane
2-Methylbut-2-ene
2

Which products are formed when phenol reacts with dilute \( \ce{HNO3} \)?

Phenol reacts with dilute \( \ce{HNO3} \) to form a mixture of o-nitrophenol and p-nitrophenol due to the ortho-para directing effect of the -OH group.

Only 4-nitrophenol
Only 2-nitrophenol
Mixture of o- and p-nitrophenol
3-nitrophenol
3

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