Question

considering the passage about crude oil, why is distillation the main process for separating the contents of crude oil?
crude oil is a homogeneous mixture.
crude oil is a heterogeneous mixture
a major byproduct of crude oil is gasoline.

Explanation:

Distillation works well for homogeneous mixtures. Crude oil is a homogeneous mixture of hydrocarbons with different boiling - points. Distillation separates components based on boiling - point differences. The fact that gasoline is a by - product is not a reason for distillation being the main process, and crude oil is not heterogeneous.

Answer:

Crude oil is a homogeneous mixture.