Final answer:
When two clear liquid solutions mix to form a red solid, it represents a chemical change because of the new substance formation and color change, which are indications of a chemical reaction. so, option b is the correct answer.
Step-by-step explanation:
When two clear liquid solutions are thoroughly mixed, and a red solid forms, this change is most likely a chemical change. This is indicated by the formation of a precipitate (the solid) and a color change in the reaction mixture. A physical change would only entail a change in the state of matter or form of the substances involved, without changing their chemical compositions. However, the formation of a new substance with different properties, such as a color change and a solid precipitate, is evidence of a chemical reaction where new bonds are formed or existing bonds are broken, altering the chemical composition of the substances involved.
The formation of a red solid when two clear liquid solutions are mixed is most likely a chemical change.
The formation of a red solid when two clear liquid solutions are thoroughly mixed is most likely a chemical change. Chemical changes involve the formation of new substances with different properties. In this case, the color change and the formation of a solid indicate a chemical reaction has occurred.