Exploring Alkanes and Alkenes

What is the general formula for alkanes?

• CnH(2n+2)

• C(n-1)H(2n-1)

• CnH2n

• C2nH2n

How do alkenes differ from alkanes in terms of bonding?

• Alkenes are saturated, while alkanes are unsaturated.

• Alkenes have double bonds, while alkanes have only single bonds.

• Alkenes contain only carbon, while alkanes contain oxygen.

• Alkenes have triple bonds, while alkanes have double bonds.

Name the first three alkanes in the homologous series.

• Methanol, Ethanol, Propanol

• Butane, Pentane, Hexane

• Methane, Ethane, Propane

• Acetylene, Benzene, Toluene

What type of reaction do alkenes typically undergo?

• Addition reactions

• Redox reactions

• Substitution reactions

• Elimination reactions

What is the significance of the double bond in alkenes?

• The double bond in alkenes has no effect on reactivity or isomerism.

• The double bond in alkenes increases reactivity and allows for geometric isomerism.

• The double bond in alkenes decreases stability and prevents isomerism.

• The double bond in alkenes only affects boiling point and not reactivity.

How many hydrogen atoms are present in butane (C4H10)?

• 10

• 12

• 8

• 6

What is the process called when alkenes are converted to alkanes?

• Hydrolysis

• Oxidation

• Dehydrogenation

• Hydrogenation

Identify the functional group present in alkenes.

• Carbon-carbon single bond (C-C)

• Carbon-carbon double bond (C=C)

• Hydroxyl group (–OH)

• Carbon-carbon triple bond (C≡C)

What is the main characteristic that distinguishes alkanes from alkenes?

• Alkanes have a higher boiling point than alkenes.

• Alkanes contain only single bonds, while alkenes contain at least one double bond.

• Alkanes are more reactive than alkenes.

• Alkenes contain only single bonds, while alkanes contain at least one triple bond.

Provide an example of a reaction involving an alkene.

• Oxidation of butane to form butanol.

• Hydrogenation of ethene to form ethane.

• Polymerization of propene to form polypropylene.

• Dehydration of ethanol to form ethene.