Alcohols and Ethers: Structure, Properties, and Reactions

Question 1

Which of the following is the definition of an alcohol?

Accepted Answer

A compound containing a hydroxyl group (-OH) bonded to a carbon atom

Answer

A compound containing a carbonyl group (C=O)

Answer

A compound containing an amino group (-NH2)

Answer

A compound containing a carboxylic acid group (-COOH)

Question 2

What is the product of the dehydration reaction of ethanol under acidic conditions?

Accepted Answer

Ethene

Answer

Ethyne

Answer

Ethanoic acid

Answer

Ethyl acetate

Question 3

Which of the following ethers has the lowest boiling point?

Accepted Answer

Dimethyl ether

Answer

Diethyl ether

Answer

Dipropyl ether

Answer

Dibutyl ether

Question 4

Which of the following compounds is an isomer of diethyl ether?

Accepted Answer

Methyl propyl ether

Answer

1-Butanol

Answer

2-Butanol

Answer

Ethyl acetate

Question 5

Which of the following is **not** a physical property of alcohols?

Accepted Answer

High viscosity

Answer

Hydrogen bonding

Answer

Low boiling point

Answer

Solubility in water

Question 6

What type of reaction occurs when an alcohol is oxidized with potassium dichromate?

Accepted Answer

Oxidation-reduction

Answer

Addition

Answer

Substitution

Answer

Dehydration

Question 7

Which of the following reagents can be used to distinguish between primary, secondary, and tertiary alcohols?

Accepted Answer

Lucas reagent

Answer

Grignard reagent

Answer

Tollens reagent

Answer

Benedict's reagent

Question 8

What is the major product of the dehydration of 2-propanol?

Accepted Answer

Propene

Answer

1-Propanol

Answer

2-Propanone

Answer

1-Propene

Question 9

Which of the following statements about ethers is **incorrect**?

Accepted Answer

Ethers are more basic than alcohols.

Answer

Ethers have lower boiling points than alcohols with similar molecular weights.

Answer

Ethers are good solvents for ionic compounds.

Answer

Ethers are unreactive towards most reagents.

Question 10

What is the IUPAC name of the following compound: CH3CH2OCH2CH3?

Accepted Answer

1-Ethoxypropane

Answer

Ethyl ether

Answer

2-Propoxyethane

Answer

1,2-Dimethoxyethane

Question 11

What is the hybridization of the carbon atom in the C-O bond of an ether?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 12

Which type of reaction occurs when an alcohol is heated with concentrated sulfuric acid?

Accepted Answer

Dehydration

Answer

Oxidation

Answer

Substitution

Answer

Addition

Question 13

What is the boiling point of ethanol compared to water?

Accepted Answer

Lower

Answer

Higher

Answer

The same

Answer

Cannot be determined

Question 14

What is the product of the reaction between an alcohol and a carboxylic acid?

Accepted Answer

An ester

Answer

An ether

Answer

An aldehyde

Answer

A ketone

Question 15

What type of hybridization is present at the carbon atom of the hydroxyl group in an alcohol?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 16

Which of the following is a characteristic reaction of ethers?

Accepted Answer

Nucleophilic substitution

Answer

Electrophilic addition

Answer

Radical bromination

Answer

Reduction

Question 17

Which of the following reactions is characteristic of primary alcohols?

Accepted Answer

Lucas test

Answer

Iodoform test

Answer

Victor Meyer test

Answer

Fehling's test

Question 18

What is the major product of the dehydration of 2-methyl-2-propanol?

Accepted Answer

2-methylpropene

Answer

propene

Answer

2-methyl-1-propene

Answer

1-methylpropene

Question 19

What is the product of the reaction between an alcohol and a carboxylic acid?

Accepted Answer

An ester

Answer

An ether

Answer

An amide

Answer

An aldehyde

Question 20

What is the major product of the oxidation of a secondary alcohol with chromic acid?

Accepted Answer

A ketone

Answer

An aldehyde

Answer

A carboxylic acid

Answer

An ester

Question 21

Which statement best describes the structure of alcohols?

Accepted Answer

Organic compounds containing the -OH functional group.

Answer

Organic compounds containing only carbon and hydrogen atoms.

Answer

Inorganic compounds containing the -OH functional group.

Answer

Inorganic compounds containing only carbon and hydrogen atoms.

Question 22

Which of the following is considered the weakest acid among the given options?

Accepted Answer

Methanol

Answer

Ethanol

Answer

Propanol

Answer

Butanol

Question 23

In the oxidation reaction of primary alcohols to aldehydes, which reagent is commonly used?

Accepted Answer

CrO₃

Answer

KMnO₄

Answer

NaBH₄

Answer

H₂SO₄

Question 24

Which of the following compounds is an example of an ether?

Accepted Answer

Dimethyl ether

Answer

Ethanol

Answer

Propanone

Answer

Butanoic acid

Question 25

Which statement accurately describes the structure of ethers?

Accepted Answer

Organic compounds containing the -O- functional group.

Answer

Organic compounds containing only carbon and hydrogen atoms.

Answer

Inorganic compounds containing the -O- functional group.

Answer

Inorganic compounds containing only carbon and hydrogen atoms.

Question 26

Which reaction is characteristic of ethers?

Accepted Answer

Cleavage

Answer

Esterification

Answer

Neutralization

Answer

Substitution

Question 27

Which reagent is commonly used to cleave ethers?

Accepted Answer

HI

Answer

NaOH

Answer

H₂SO₄

Answer

KMnO₄

Question 28

Which of the following is NOT a characteristic of alcohols?

Accepted Answer

High boiling point due to weak van der Waals forces

Answer

Solubility in water due to hydrogen bonding

Answer

Polarity

Answer

Ability to form hydrogen bonds

Question 29

What is the major product of the dehydration of ethanol under acidic conditions?

Accepted Answer

Ethene

Answer

Ethylene glycol

Answer

Propene

Answer

Ethanal

Question 30

What is the primary oxidation product of a primary alcohol under mild conditions?

Accepted Answer

Aldehyde

Answer

Ketone

Answer

Carboxylic acid

Answer

Ester

Question 31

Which of the following reagents can be used to distinguish between primary, secondary, and tertiary alcohols?

Accepted Answer

Lucas reagent

Answer

Fehling's reagent

Answer

Tollens reagent

Answer

Benedict's reagent

Question 32

Which of the following is a structural isomer of propanol?

Accepted Answer

Isopropanol

Answer

Butanol

Answer

Methanol

Answer

Ethanol

Question 33

What is the hybridization of each carbon atom in the ether functional group?

Accepted Answer

sp3

Answer

sp2

Answer

sp

Answer

sp3d

Question 34

Which reaction represents the dehydration of an alcohol?

Accepted Answer

CH₃CH₂OH → CH₂=CH₂ + H₂O

Answer

CH₃CH₂OH + O₂ → CH₃COOH + H₂O

Answer

CH₃CH₂OH + HCl → CH₃CH₂Cl + H₂O

Answer

CH₃CH₂OH + NaOH → CH₃CH₂ONa + H₂O

Question 35

What is a characteristic physical property of ethers?

Accepted Answer

Low boiling point

Answer

High solubility in water

Answer

Strong odor

Answer

High density

Question 36

Which reagent can be used to oxidize a primary alcohol to an aldehyde?

Accepted Answer

PCC (Pyridinium chlorochromate)

Answer

H2SO4

Answer

KMnO4

Answer

NaBH4

Question 37

Which ether is chiral?

Accepted Answer

CH₃CH(OCH₃)CH₃

Answer

CH₃OCH₃

Answer

CH₃OCH₂CH₂CH₃

Answer

CH₃CH₂OCH₂CH₃

Question 38

What is a characteristic reaction of epoxides?

Accepted Answer

Ring opening by nucleophiles

Answer

Addition of water

Answer

Elimination of water

Answer

Substitution of the oxygen atom

Question 39

Which compound is an example of a cyclic ether?

Accepted Answer

Tetrahydrofuran

Answer

Methyl tert-butyl ether

Answer

1-Butanol

Answer

Diethyl ether

Question 40

What is the major product of the oxidation of ethanol using potassium dichromate in acidic conditions?

Accepted Answer

Ethanoic acid

Answer

Butanol

Answer

Ethanal

Answer

Diethyl ether

Question 41

Which of the following statements correctly describes the general solubility of ethers in water?

Accepted Answer

Ethers are generally less soluble in water than alcohols.

Answer

Ethers are generally more soluble in water than alcohols.

Answer

Ethers are as soluble in water as alcohols.

Question 42

A tertiary alcohol, such as 2-methyl-2-propanol, cannot be oxidized to a ketone or aldehyde. Why?

Accepted Answer

Tertiary alcohols lack a hydrogen atom attached to the carbon bearing the hydroxyl group.

Answer

Tertiary alcohols are easily dehydrated instead of oxidized.

Answer

Tertiary alcohols are too stable to be oxidized.

Question 43

Which of the following compounds is an example of an ether?

Accepted Answer

Diethyl ether

Answer

Propanone

Answer

Ethanol

Answer

Butanoic acid

Question 44

Which of the following reagents is commonly used for the dehydration of alcohols to form alkenes?

Accepted Answer

Concentrated sulfuric acid

Answer

Potassium permanganate

Answer

Lithium aluminum hydride

Answer

Sodium hydroxide

Question 45

What is the IUPAC name of the following compound: CH3CH2OCH2CH3?

Accepted Answer

Diethyl ether

Answer

Propanone

Answer

Butanol

Answer

Ethanal

Question 46

Which of the following is a characteristic property of alcohols?

Accepted Answer

They are capable of forming hydrogen bonds.

Answer

They are insoluble in water.

Answer

They are highly volatile.

Answer

They are acidic in nature.

Question 47

A reaction between an alcohol and a carboxylic acid in the presence of an acid catalyst produces:

Accepted Answer

An ester

Answer

An aldehyde

Answer

An ether

Answer

An alkene

Question 48

Which of the following statements describes the correct order of boiling points for the following compounds: ethanol, diethyl ether, and propane?

Accepted Answer

Ethanol > diethyl ether > propane

Answer

Diethyl ether > ethanol > propane

Answer

Propane > diethyl ether > ethanol

Answer

Ethanol > propane > diethyl ether