Organic Chemistry Quizzes: Test Your Knowledge

Question 1

Which of the following reactions is an example of an electrophilic addition reaction?

Accepted Answer

Addition of HBr to an alkene

Answer

Nucleophilic substitution of an alkyl halide

Answer

Oxidation of an alcohol to a ketone

Answer

Reduction of an alkene to an alkane

Question 2

Identify the compound that is an aldehyde.

Accepted Answer

CH3CH2CHO

Answer

CH3OH

Answer

CH3COCH3

Answer

CH3COOH

Question 3

Identify the characteristic IR absorption frequency range for a carbonyl group.

Accepted Answer

1650-1750 cm-1

Answer

3300-3500 cm-1

Answer

2800-2900 cm-1

Answer

1350-1450 cm-1

Question 4

Which of the following is the most reactive electrophile?

Accepted Answer

CH3+

Answer

CH2=

Answer

CH3COOH

Answer

NH4+

Question 5

What is the product of the complete addition of hydrogen to a triple bond?

Accepted Answer

Alkane

Answer

Alkene

Answer

Cycloalkane

Answer

Alkyl halide

Question 6

Which of the following reactions does NOT involve an alkene?

Accepted Answer

Hydrolysis

Answer

Hydrogenation

Answer

Polymerisation

Answer

Addition of bromine

Question 7

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

Accepted Answer

Ester

Answer

Ether

Answer

Amide

Answer

Ketone

Question 8

Identify the option that does NOT represent a functional group:

Accepted Answer

Alkyl

Answer

Alkenyl

Answer

Alcohol

Answer

Amine

Question 9

Which of the following reactions is a characteristic of alkenes?

Accepted Answer

Addition

Answer

Substitution

Answer

Elimination

Answer

Oxidation

Question 10

Which of the following is considered the strongest acid?

Accepted Answer

Methanoic acid

Answer

Ethanoic acid

Answer

Propanoic acid

Answer

Butanoic acid

Question 11

Identify the option that represents a polymer:

Accepted Answer

Polyethylene

Answer

Ethanol

Answer

Benzene

Answer

Sodium chloride

Question 12

What type of hybridization is exhibited by the carbon atom involved in a C=C double bond?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 13

Which of the following reactions is commonly used to produce alkenes?

Accepted Answer

Dehydration

Answer

Hydrogenation

Answer

Hydrolysis

Answer

Oxidation

Question 14

Provide the correct IUPAC name for the compound with the molecular formula CH3CH(CH3)CH2CH2CH3.

Accepted Answer

2-Methylpentane

Answer

3-Methylpentane

Answer

4-Methylpentane

Answer

2-Ethylbutane

Question 15

Identify the type of reaction that occurs when hydrogen reacts with ethene in the presence of a nickel catalyst.

Accepted Answer

Addition

Answer

Elimination

Answer

Substitution

Answer

Polymerization

Question 16

Indicate which functional group is present in carboxylic acids.

Accepted Answer

-COOH

Answer

-OH

Answer

-NH2

Answer

-C=O

Question 17

Identify the isomer of butene among the following options.

Accepted Answer

2-Methylpropene

Answer

Pentane

Answer

Butyne

Answer

Cyclobutane

Question 18

Indicate the hybridization of the carbon atom involved in the C=C double bond of ethene.

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 19

Identify the compound among the following options that exhibits the strongest intermolecular forces.

Accepted Answer

Propanoic acid

Answer

Methane

Answer

Ethanol

Answer

Butylamine

Question 20

Determine the major product formed during the dehydration of 2-methyl-2-propanol.

Accepted Answer

2-Methylpropene

Answer

1-Methylpropene

Answer

2-Methyl-1-propene

Answer

3-Methyl-1-propene

Question 21

Identify the reducing agent among the following compounds.

Accepted Answer

Sodium borohydride

Answer

Sodium hypochlorite

Answer

Potassium dichromate

Answer

Potassium permanganate

Question 22

Which of the following is the strongest type of intermolecular force?

Accepted Answer

Hydrogen bonding

Answer

Dipole-dipole forces

Answer

London dispersion forces

Answer

Ionic bonding

Question 23

What is the hybridization of the carbon atom in methane?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 24

Which of the following molecules is polar?

Accepted Answer

NH3

Answer

CH4

Answer

CO2

Answer

H2

Question 25

Which of the following is the correct order of increasing boiling points for the compounds CH4, NH3, H2O, and HF?

Accepted Answer

CH4 < NH3 < H2O < HF

Answer

HF < H2O < NH3 < CH4

Answer

NH3 < CH4 < HF < H2O

Answer

H2O < HF < CH4 < NH3

Question 26

Which functional group is present in alcohols?

Accepted Answer

-OH

Answer

-COOH

Answer

-CHO

Answer

-NH2

Question 27

What type of reaction occurs between an alkene and a hydrogen molecule in the presence of a catalyst?

Accepted Answer

Addition

Answer

Elimination

Answer

Substitution

Answer

Polymerization

Question 28

What is the general formula for alkanes?

Accepted Answer

CnH2n+2

Answer

CnH2n

Answer

CnHn

Answer

CnHn+2

Question 29

What is the product of the addition reaction between an alkene and a halogen?

Accepted Answer

Alkyl halide

Answer

Alkene dihalide

Answer

Alkyne

Answer

Alcohol

Question 30

Which of the following reactions is classified as an elimination reaction?

Accepted Answer

Removal of water from an alcohol

Answer

Addition of hydrogen to an alkene

Answer

Substitution of a hydroxyl group for a halogen

Answer

Polymerization of an alkene

Question 31

What is the hybridization of the carbon atom in methane (CH4)?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 32

Which of the following is an example of a branched alkane?

Accepted Answer

2-methylpropane

Answer

butane

Answer

hexane

Answer

octane

Question 33

What is the IUPAC name of the compound with the structural formula CH3CH(CH3)CH2CH3?

Accepted Answer

2-methylbutane

Answer

3-methylbutane

Answer

2-ethylpropane

Answer

3-ethylpropane

Question 34

Which of the following accurately describes alkanes?

Accepted Answer

Saturated hydrocarbons containing only single carbon-carbon bonds

Answer

Compounds that react readily with water

Answer

Hydrocarbons containing one or more carbon-carbon double bonds

Answer

Polar molecules with a high dipole moment

Question 35

Determine the IUPAC name for the compound with the molecular formula CH3CH=CHCH3:

Accepted Answer

But-2-ene

Answer

2-Butene

Answer

Pent-1-ene

Answer

1-Butene

Question 36

Which of the following species acts as a nucleophile?

Accepted Answer

OH-

Answer

H+

Answer

C2H5+

Answer

CH3Cl

Question 37

Determine the hybridization of the carbon atom in the carbonyl group of an aldehyde:

Accepted Answer

sp2

Answer

sp3

Answer

sp3d

Answer

sp

Question 38

Which reaction pathway is used to synthesize carboxylic acids?

Accepted Answer

Oxidation of primary alcohols

Answer

Reduction of ketones

Answer

Hydrolysis of esters

Question 39

Identify the functional group present in an ester:

Accepted Answer

-COOR

Answer

-OH

Answer

-CHO

Answer

-COOH

Question 40

Which of the following reactions is classified as a condensation reaction?

Accepted Answer

Formation of an ester from an alcohol and a carboxylic acid

Answer

Addition of water to an alkene

Answer

Hydrolysis of an ester

Question 41

Provide the IUPAC name for the compound with the molecular formula CH3CH2COOCH2CH3:

Accepted Answer

Ethyl propanoate

Answer

Methyl butanoate

Answer

Propyl acetate

Answer

Butyl ethanoate