What are solid mixtures in a classroom?

The cement on walls of classroom. The stainless Steel, plastic + aluminimum used in blades of ceiling fan The door handle of classroom made of alloys (brass, steel) Chalk

Explanation:

Solid Mixture : These are the mixture (contain two or more unreactive substances) formed by mixing two or more solids.

Example:

Alloy - mixture of different metal (Brass : zinc + Copper), (Steel : iron + Carbon) Concrete : Cement + Rock + lime + sand + water Stones : granite, topaz