Question 1

Which of the following statements best describes the difference between alcohols and phenols?

Accepted Answer

Alcohols possess a hydroxyl group ($$-OH) $$attached to a saturated carbon, while phenols possess a hydroxyl group directly attached to a benzene ring.

Question 2

What is the correct IUPAC name for the following structure?

$$\mathrm{CH_3CH_2CH(OH)CH_2CH_3}$$

Accepted Answer

2-pentanol

Question 3

Which of the following alcohols is most soluble in water?

Accepted Answer

1-propanol

Question 4

Why do alcohols generally have higher boiling points than their corresponding alkanes?

Accepted Answer

Alcohols can form hydrogen bonds due to the $$-OH$$ group.

Question 5

Which reagent is commonly used to convert a primary alcohol into an alkyl bromide via an $$S_N2$$ mechanism?

Accepted Answer

Phosphorous tribromide ($$\mathrm{$$PBr_3$$})$$

Question 6

Which of the following best explains why tertiary alcohols do not undergo oxidation under normal conditions?

Accepted Answer

Tertiary alcohols lack a hydrogen atom on the carbon bearing the $$-OH$$ group.

Question 7

A student wants to prepare 2-bromopropane from 2-propanol. Which reagent should they use?

Accepted Answer

Hydrobromic acid ($$\mathrm{HBr})$$

Question 8

Which of the following is the correct classification for the alcohol in the structure below?

$$\mathrm{CH_3CH_2CH_2OH}$$

Accepted Answer

Primary alcohol

Question 9

Which of the following statements about the acidity of alcohols and phenols is correct?

Accepted Answer

Phenols are more acidic than alcohols due to resonance stabilization of the conjugate base.

Question 10

Which of the following reagents will oxidize a primary alcohol to a carboxylic acid?

Accepted Answer

Chromic acid ($$\mathrm{H_2CrO_4}$$, Jones reagent)

Question 11

Which of the following best describes the effect of electron-withdrawing substituents on the acidity of alcohols?

Accepted Answer

They increase the acidity by stabilizing the conjugate base through inductive effects.

Question 12

Which of the following is a correct product of the acid-catalyzed hydration of 2-methylpropene ($$\mathrm{CH_2$=C(CH_3$)_2}$$)?

Accepted Answer

2-methyl-2-propanol

Question 13

A chemist treats ethanol with sodium hydride ($$\mathrm{NaH}). $$What is the major organic product?

Accepted Answer

Ethoxide ion ($$\mathrm{CH_3CH_2O^-})$$

Question 14

Which of the following is true about the dehydration of alcohols?

Accepted Answer

Secondary and tertiary alcohols undergo E1 dehydration to form alkenes.

Question 15

Which of the following is the correct IUPAC name for the compound below?

A benzene ring with an $$-OH$$ group at position 1 and a $$-NO_2$ group at position 2.

Accepted Answer

2-nitrophenol

Question 16

Which of the following statements about Jones oxidation is correct?

Accepted Answer

Jones reagent exhaustively oxidizes primary alcohols to carboxylic acids.

Question 17

Which of the following is a common use of hexylresorcinol, based on its chemical properties?

Accepted Answer

As an antibacterial and antifungal agent due to its balance of hydrophobic and hydrophilic regions

Question 18

A student wants to convert cyclopentanol to bromocyclopentane. Which reagent and mechanism should they use?

Accepted Answer

Phosphorous tribromide ($$\mathrm{$$PBr_3$$}$$), $$S_N2$$ mechanism

Question 19

Which of the following is the correct product when 1-butanol is oxidized with PCC?

Accepted Answer

Butanal ($$\mathrm{CH_3CH_2CH_2CHO})$$

Alcohols and Phenols: Structure, Properties, Preparation, and Reactions

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