Organic Chemistry Quizzes: Test Your Understanding of Carbon Compounds

Question 1

Which of the following is a defining characteristic of organic compounds?

Accepted Answer

Primarily form covalent bonds

Answer

Composed exclusively of carbon, hydrogen, and oxygen atoms

Answer

Exist solely as solids at room temperature

Answer

Universally soluble in water

Question 2

What is the major product of the following reaction: CH₃CH₂CH=CH₂ + HBr → ?

Accepted Answer

CH₃CHBrCH₂CH₃

Answer

CH₃CH₂CHBrCH₃

Answer

CH₃CH₂CH=CHBr

Answer

CH₂BrCH₂CH=CH₂

Question 3

Which of the following is a strong acid?

Accepted Answer

Hydrochloric acid

Answer

Acetic acid

Answer

Carbonic acid

Answer

Phenol

Question 4

What is the major product of the following reaction: CH₃CH₂CH₂Br + KOH → ?

Accepted Answer

CH₃CH₂CH₂OH

Answer

CH₂=CHCH₂OH

Answer

CH₃CH=CHOH

Answer

CH₃COOH

Question 5

What is the hybridization state of the carbon atoms in an alkene?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 6

Which of the following compounds is an organic acid?

Accepted Answer

Acetic acid

Answer

Ethane

Answer

Propene

Answer

Benzene

Question 7

Which of the following reactions is a combustion reaction?

Accepted Answer

Burning of methane

Answer

Addition of hydrogen to an alkene

Answer

Substitution of a halogen with an alcohol

Answer

Reaction of an acid with a base

Question 8

What is the hybridization of the nitrogen atom in a primary amine?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 9

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

Accepted Answer

Cyclohexane

Answer

Propane

Answer

Butane

Answer

Benzene

Question 10

What is the product of the following reaction: CH3CH2Br + NaOH →?

Accepted Answer

CH3CH2OH

Answer

CH3CH2Br

Answer

CH3COOH

Answer

CH3COONa

Question 11

Which reaction type involves the breakage of a carbon-hydrogen bond (C-H)?

Accepted Answer

Substitution

Answer

Elimination

Answer

Addition

Answer

Redox

Question 12

Predict the product of the reaction: CH3CH2Br + NaOH →

Accepted Answer

CH3CH2OH

Answer

CH3CH2Na

Answer

CH2=CH2

Answer

No reaction

Question 13

Which of the following is the defining characteristic of organic molecules?

Accepted Answer

Presence of carbon atoms

Answer

Presence of ionic charge

Answer

High reactivity

Answer

Water solubility

Question 14

Which functional group characterizes alcohols?

Accepted Answer

-OH

Answer

-COOH

Answer

-NH2

Answer

-C=O

Question 15

What product results from the following reaction: 2CH3CH2OH + O2 → ?

Accepted Answer

2CH3COOH + 2H2O

Answer

CH3COOCH2CH3 + H2O

Answer

CH3CH2O + H2O

Answer

No reaction occurs

Question 16

What is the primary function of enzymes in organic reactions?

Accepted Answer

Decreasing activation energy

Answer

Increasing activation energy

Answer

Altering reaction products

Answer

Preventing reactions from occurring

Question 17

Identify the renewable resource used in organic chemistry:

Accepted Answer

Biomass

Answer

Petroleum

Answer

Natural gas

Answer

Coal

Question 18

In the molecule H2C=CH2, what is the hybridization of the carbon atom?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 19

Which functional group is present in the molecule CH3CH2OH?

Accepted Answer

Alcohol

Answer

Aldehyde

Answer

Ketone

Answer

Carboxylic acid

Question 20

Which of the following compounds is an isomer of butane?

Accepted Answer

2-methylpropane

Answer

Pentane

Answer

Ethene

Answer

Propene

Question 21

Which of the following is a nucleophile?

Accepted Answer

OH-

Answer

H+

Answer

CH3+

Answer

Cl-

Question 22

Which of the following is NOT a type of organic compound?

Accepted Answer

Carbonates

Answer

Hydrocarbons

Answer

Alcohols

Answer

Carboxylic acids

Question 23

Which of the following reactions is an example of a substitution reaction?

Accepted Answer

Reaction of an alcohol with an acid chloride

Answer

Addition of hydrogen to an alkene

Answer

Oxidation of an aldehyde to a carboxylic acid

Answer

Polymerization of ethylene

Question 24

What is the product of the reaction between ethene and hydrogen bromide?

Accepted Answer

1-Bromoethane

Answer

2-Bromoethane

Answer

1,2-Dibromoethane

Answer

No reaction

Question 25

Which of the following functional groups is present in esters?

Accepted Answer

-COOR

Answer

-OH

Answer

-COOH

Answer

-NH$_2$

Question 26

What is the strongest intermolecular force present in organic compounds?

Accepted Answer

London dispersion forces

Answer

Hydrogen bonding

Answer

Dipole-dipole interactions

Answer

Ionic bonding

Question 27

Which of the following techniques is used to separate organic compounds based on their differences in polarity?

Accepted Answer

Chromatography

Answer

Distillation

Answer

Spectroscopy

Answer

Electrophoresis

Question 28

What is the hybridization of the carbon atom in methane?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d2

Question 29

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

Accepted Answer

Hydrogenation

Answer

Combustion

Answer

Substitution

Answer

Elimination

Question 30

Which of the following compounds is an alkane?

Accepted Answer

CH3CH2CH3

Answer

CH3CH2OH

Answer

CH3COOH

Answer

CH3CHO

Question 31

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

Accepted Answer

Ester

Answer

Amide

Answer

Ether

Answer

Ketone

Question 32

What is the hybridization of the nitrogen atom in pyridine?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 33

Which of the following is a defining characteristic of organic compounds?

Accepted Answer

They contain carbon atoms.

Answer

They are typically insoluble in water.

Answer

They have low melting and boiling points.

Answer

They are highly reactive.

Question 34

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

Accepted Answer

sp³

Answer

sp

Answer

sp²

Answer

sp³d

Question 35

Which of the following reactions demonstrates an addition reaction?

Accepted Answer

CH₂=CH₂ + H₂ → CH₃-CH₃

Answer

CH₃CH₂OH + HCl → CH₃CH₂Cl + H₂O

Answer

CH₃COOH + NaOH → CH₃COONa + H₂O

Answer

2CH₃CH₂Br + 2Na → CH₃CH₂Na + CH₂=CH₂

Question 36

Which of the following functional groups is characteristic of an alcohol?

Accepted Answer

-OH

Answer

-NH₂

Answer

-COOH

Answer

-CHO

Question 37

Identify the strong acid from the following list:

Accepted Answer

Hydrochloric acid (HCl)

Answer

Acetic acid (CH₃COOH)

Answer

Carbonic acid (H₂CO₃)

Answer

Water (H₂O)

Question 38

Determine the hybridization of the carbon atom in carbon dioxide (CO₂).

Accepted Answer

sp

Answer

sp²

Answer

sp³

Answer

sp³d

Question 39

What type of hybridization do the carbon atoms in methane (CH4) exhibit?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 40

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

Accepted Answer

Hydrogenation

Answer

Esterification

Answer

Saponification

Answer

Substitution

Question 41

Which of the following is considered a biomolecule?

Accepted Answer

Glucose

Answer

Sodium chloride

Answer

Water

Answer

Carbon dioxide

Question 42

What is the approximate bond angle between the carbon-carbon bonds in a tetrahedral carbon atom?

Accepted Answer

109.5 degrees

Answer

90 degrees

Answer

120 degrees

Answer

180 degrees

Question 43

What is the IUPAC name for the following compound: CH3(CH2)5CH3?

Accepted Answer

Hexane

Answer

2-Methylpentane is an incorrect name for the given compound.

Answer

2,3-Dimethylbutane is an incorrect name for the given compound.

Answer

3-Ethylbutane is an incorrect name for the given compound.

Question 44

What is the hybridization of the carbon atoms in ethane, the simplest alkane?

Accepted Answer

sp3 hybridization describes the bonding of carbon atoms in ethane, where each carbon forms four single bonds.

Answer

sp2 hybridization is not applicable to carbon atoms in ethane.

Answer

p hybridization is not applicable to carbon atoms in ethane.

Answer

sp hybridization is not applicable to carbon atoms in ethane.

Question 45

Which of the following chemical reactions is an example of a combustion reaction?

Accepted Answer

CH4 + 2O2 → CO2 + 2H2O

Answer

CH3OH + HCl → CH3Cl + H2O is an example of a nucleophilic substitution reaction.

Answer

C2H4 + Br2 → C2H4Br2 is an example of an addition reaction.

Question 46

What is the product of the following nucleophilic substitution reaction: CH3CH2Br + NaOH →

Accepted Answer

CH3CH2OH is the product of this reaction, where the hydroxide ion (OH-) from NaOH replaces the bromide ion (Br-) on the carbon atom.

Answer

CH3CHO is not the product of this reaction.

Answer

CH3CH=CH2 is not the product of this reaction.

Answer

CH3COOH is not the product of this reaction.

Question 47

Which of the following is an example of a polymer?

Accepted Answer

Polyethylene is a polymer, a large molecule made up of repeating subunits, in this case, ethylene monomers.

Answer

Ethanol is not a polymer, but rather a small organic molecule.

Answer

Ethylene glycol is not a polymer, but rather a small organic molecule.

Question 48

What is the functional group present in carboxylic acids?

Accepted Answer

-COOH is the carboxyl functional group, which is characteristic of carboxylic acids.

Answer

-OH is the hydroxyl functional group, which is characteristic of alcohols and phenols.

Answer

-NH2 is the amino functional group, which is characteristic of amines.

Answer

-C=O is the carbonyl functional group, which is characteristic of aldehydes and ketones.

Question 49

Which of the following is a natural source of carbohydrates?

Accepted Answer

Plants are a primary source of carbohydrates, as they produce carbohydrates through the process of photosynthesis.

Answer

Water does not contain carbohydrates.

Answer

Animals do not produce carbohydrates but consume them.

Answer

Minerals do not contain carbohydrates.