Alkenes and Alkynes: Interactive Learning Quizzes for Chemistry Students

Question 1

Which of the following is a cyclic alkene? A cyclic alkene is an alkene that has a ring structure.

Accepted Answer

Cyclopropane

Answer

Ethylene

Answer

Propene

Answer

1-butene

Question 2

What is the hybridization of the carbon atoms in the triple bond of an alkyne? Hybridization is the process of combining atomic orbitals to form new hybrid orbitals with different shapes and energies.

Accepted Answer

sp

Answer

sp2

Answer

sp3

Answer

sp3d2

Question 3

Which of the following is the most characteristic reaction of alkenes?

Accepted Answer

Addition

Answer

Substitution

Answer

Elimination

Answer

Isomerization

Question 4

In the addition reaction of an alkene with hydrogen bromide, which product is formed?

Accepted Answer

Alkyl bromide

Answer

Alkyl chloride

Answer

Alkyl iodide

Answer

Alkyl fluoride

Question 5

Which reagent is used for the electrophilic addition of water to alkenes?

Accepted Answer

H2O/H+

Answer

NaOH/H2O

Answer

KMnO4/H2O

Answer

Br2/H2O

Question 6

What does Markovnikov's rule state about the addition of HX to an unsymmetrical alkene?

Accepted Answer

The hydrogen atom adds to the carbon with the most alkyl groups.

Answer

The hydrogen atom adds to the carbon with the least alkyl groups.

Answer

The product is a Markovnikov product.

Answer

The product is an anti-Markovnikov product.

Question 7

Which of the following is an elimination reaction?

Accepted Answer

Dehydration of an alcohol

Answer

Addition of HBr to an alkene

Answer

Hydrolysis of an ester

Answer

Substitution of an alkyl halide with NaOH

Question 8

Which of the following compounds is an alkyne?

Accepted Answer

Ethyne

Answer

Ethene

Answer

Propane

Answer

Propylene

Question 9

What is the reaction of an alkyne with hydrogen in the presence of a catalyst called?

Accepted Answer

Hydrogenation

Answer

Hydrohalogenation

Answer

Hydrolysis

Answer

Oxidation

Question 10

Determine the IUPAC name for the alkene CH3-CH=CH-CH2-CH3.

Accepted Answer

2-Pentene

Answer

1-Pentene

Answer

3-Pentene

Answer

2-Butene

Question 11

Which of the provided reagents is suitable for carrying out electrophilic addition reactions on alkenes?

Accepted Answer

Hydrogen bromide (HBr)

Answer

Water (H2O)

Answer

Sodium hydroxide (NaOH)

Answer

Lithium aluminum hydride (LiAlH4)

Question 12

Which of the following compounds is an example of a cyclic alkene?

Accepted Answer

Cyclopentene

Answer

Cyclohexane

Answer

1-Butene

Answer

2-Methyl-1-propene

Question 13

What type of hybridization do the carbon atoms in an alkene's double bond exhibit?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 14

Which of the following reactions is unique to alkynes and not applicable to alkenes?

Accepted Answer

Addition of osmium tetroxide (OsO4)

Answer

Addition of water (H2O)

Answer

Addition of hydrogen bromide (HBr)

Answer

Formation of a Grignard reagent

Question 15

What is the expected major product of the following reaction: CH3-CH2-C≡CH + H2 (Lindlar catalyst)?

Accepted Answer

cis-2-Butene (CH3-CH2-CH=CH2)

Answer

trans-2-Butene (CH3-CH2-C≡CH-H)

Answer

1-Butene (CH2=CH-CH2-CH3)

Answer

Butane (CH3-CH2-CH2-CH2-H)

Question 16

Which of the following statements accurately defines an alkene?

Accepted Answer

A hydrocarbon containing at least one carbon-carbon double bond

Answer

A hydrocarbon with a ring structure

Answer

A fully saturated hydrocarbon

Question 17

According to IUPAC nomenclature rules, what is the correct name for the alkene: CH3CH=CHCH2CH3?

Accepted Answer

Pent-2-ene

Answer

Oct-4-ene

Answer

But-2-ene

Answer

Hex-3-ene

Question 18

Which of the following reactions is NOT a typical characteristic of alkenes?

Accepted Answer

Substitution reaction

Answer

Elimination reaction

Answer

Polymerization

Answer

Addition reaction

Question 19

What is the major product of the following reaction: CH3CH=CHCH3 + H2 (Pt catalyst)?

Accepted Answer

Butane (CH3CH2CH2CH3)

Answer

iso-Butene (CH3CH2CH=CHCH3)

Answer

2-Butene (CH3CH=CHCH2CH3)

Answer

1-Butene (CH3CH=CHCH2CH2)

Question 20

What is the product of the following reaction: CH3C≡CH + H2 (Lindlar catalyst)?

Accepted Answer

cis-2-Butene (CH3CH=CHCH3)

Answer

1-Butyne (CH3C≡CHH)

Answer

Butane (CH3CH2CH2CH2)

Answer

trans-2-Butene (CH2=CHCH3)