Cracking produces a shorter alkane and an alkene. Which of the following is the alkene?

Cracking produces a shorter alkane and an alkene. Which of the following is the alkene?

• A. Alkene
• B. Alcohol
• C. Aldehyde
• D. Ether

Answer: (A)

Cracking breaks down larger alkane molecules into smaller ones, typically giving a shorter alkane and an alkene. The alkene is produced because the process creates a carbon-carbon double bond in one of the fragments, giving an unsaturated hydrocarbon. The other options—an alcohol, an aldehyde, or an ether—aren’t formed in simple cracking, since that process doesn’t introduce oxygen-containing groups or create those functional groups. So the product that fits the description of an alkene is the alkene itself.

Cracking breaks down larger alkane molecules into smaller ones, typically giving a shorter alkane and an alkene. The alkene is produced because the process creates a carbon-carbon double bond in one of the fragments, giving an unsaturated hydrocarbon. The other options—an alcohol, an aldehyde, or an ether—aren’t formed in simple cracking, since that process doesn’t introduce oxygen-containing groups or create those functional groups. So the product that fits the description of an alkene is the alkene itself.