Concept:A solution is a homogeneous mixture of two or more substances, and its type depends on the physical state of the solute and solvent.
Explanation:Brass is an alloy made by melting and mixing copper (
Cu) and zinc (
Zn).
Both copper and zinc exist as solids at room temperature.
When mixed, they form a uniform, homogeneous solid mixture called an alloy.
In this mixture, the solute (zinc) is dispersed in the solvent (copper), and both are in the solid state.
Hence, brass is classified as a solid-in-solid solution.
Answer:Option A: solid in solid