Question

Is smoke a homogeneous or heterogeneous mixture? Give reasons to support your answer.

Answer 1

Smoke is a heterogeneous mixture.

Reasons that indicate smoke is a heterogeneous mixture:

• A heterogeneous mixture is a mixture with non-uniform composition of constituents throughout it's bulk.
• Smoke is a mixture of solid in gas. Tiny solid particles called suspended particulate matter (SPM) float about in gas to form smoke.
• The amount of solids floating about in different parts of gas is never same. So the composition of smoke is different throughout it's bulk.
• Hence, smoke is a heterogeneous mixture.