Organic Chemistry: Hydrocarbons

What is the general formula for alkanes?

• CnH2n-2

• CnH2n+2

• CnH2n

• CnH2n+3

Describe the process of combustion of hydrocarbons.

• Combustion of hydrocarbons is a slow process that does not involve the release of heat.

• The process of combustion of hydrocarbons involves the reaction of hydrocarbons with oxygen to produce carbon dioxide, water, and heat.

• The process of combustion of hydrocarbons results in the formation of sulfur dioxide, water, and heat.

• Combustion of hydrocarbons involves the reaction of hydrocarbons with nitrogen to produce carbon dioxide, water, and heat.

What is the difference between saturated and unsaturated hydrocarbons?

• Saturated hydrocarbons are solid at room temperature, while unsaturated hydrocarbons are gaseous.

• Saturated hydrocarbons are more reactive than unsaturated hydrocarbons.

• Saturated hydrocarbons have triple bonds, while unsaturated hydrocarbons have double bonds.

• Saturated hydrocarbons have only single bonds, while unsaturated hydrocarbons have double or triple bonds.

Explain the concept of isomerism in hydrocarbons.

• Isomerism in hydrocarbons is when different hydrocarbons have the same molecular formula but different structural arrangements.

• Isomerism in hydrocarbons is a rare occurrence.

• Isomerism in hydrocarbons is only applicable to alkanes.

• Isomerism in hydrocarbons is when they have the same molecular formula and structural arrangement.

How do alkenes react with hydrogen in the presence of a catalyst?

• Decomposition

• Polymerization

• Oxidation

• Hydrogenation