Question

When drops of one liquid are added to another liquid, a purple powder forms where the liquids meet. Did the two liquids enter a chemical reaction?

A. No. Substances entering or leaving a solution are examples of physical changes, not chemical changes.
B. Yes. A change in state without heating or cooling is a common sign of a chemical reaction.
C. No. A chemical reaction usually forms gases, not solids.
D. Yes. The mixing of two liquids is a common sign of a chemical reaction.

Answer 1

D, Yes. The mixing of two liquids is a common sighn of a chemical reaction.

Answer 2

Answer: D Yes. The mixing of two liquids is a common sign of a chemical reaction

When drops of one liquid are added to another liquid, a purple powder forms where the liquids meet. This indicates a chemical reaction between the two liquids. Color changes are often an indication of a chemical reaction. In this case, the formation of a purple powder is evidence of a new substance being formed.