Which is a heterogeneous mixture?

Which is a heterogeneous mixture?

• A. Salt Water
• B. Granite
• C. Air
• D. Steel

Answer: (B)

Heterogeneous versus homogeneous mixtures: in a heterogeneous mixture, the components aren’t distributed uniformly and you can usually see different parts. Granite shows this clearly, with visible grains of quartz, feldspar, and mica that you can distinguish in the rock, so the composition varies from place to place. Salt water is a homogeneous solution—the salt is dissolved completely in water, giving a uniform composition throughout. Air is also homogeneous at everyday scales, a single mix of gases that looks uniform. Steel is an alloy, a single metallic phase with a uniform composition. Granite is the heterogeneous mixture.

Heterogeneous versus homogeneous mixtures: in a heterogeneous mixture, the components aren’t distributed uniformly and you can usually see different parts. Granite shows this clearly, with visible grains of quartz, feldspar, and mica that you can distinguish in the rock, so the composition varies from place to place. Salt water is a homogeneous solution—the salt is dissolved completely in water, giving a uniform composition throughout. Air is also homogeneous at everyday scales, a single mix of gases that looks uniform. Steel is an alloy, a single metallic phase with a uniform composition. Granite is the heterogeneous mixture.