Hydrocarbons

Q. What is the general formula for alkenes?

Solution

The general formula for alkenes is C_nH_(2n), indicating they have one double bond.

Correct Answer: A — C_nH_(2n)

Q. What is the main characteristic of alkynes?

Solution

Alkynes are characterized by the presence of at least one triple bond between carbon atoms.

Correct Answer: C — Triple bonds

Q. What is the primary product of the complete combustion of hydrocarbons?

Solution

The complete combustion of hydrocarbons primarily produces carbon dioxide and water.

Correct Answer: C — Carbon dioxide

Q. What type of bond is primarily found in hydrocarbons?

Solution

Hydrocarbons primarily consist of covalent bonds between carbon and hydrogen atoms.

Correct Answer: B — Covalent

Q. What type of reaction occurs when an alkene reacts with hydrogen?

Solution

The reaction of an alkene with hydrogen is called hydrogenation, resulting in an alkane.

Correct Answer: B — Hydrogenation

Q. Which of the following compounds is an example of an aromatic hydrocarbon?

Solution

Benzene is an example of an aromatic hydrocarbon, characterized by its stable ring structure.

Correct Answer: B — Benzene

Q. Which of the following hydrocarbons is unsaturated?

Solution

Ethylene is an unsaturated hydrocarbon because it contains a double bond between carbon atoms.

Correct Answer: C — Ethylene

Q. Which of the following is a characteristic of alkanes?

Solution

Alkanes are saturated hydrocarbons that contain only single bonds between carbon atoms.

Correct Answer: C — Single bonds only

Q. Which of the following is a property of hydrocarbons?

Solution

Hydrocarbons generally have low boiling points compared to other organic compounds.

Correct Answer: B — Low boiling points

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