Question

Classify the following as physical or chemical change.

Grinding corn into corn flour

Answer 1

Part I - Definition

Physical change - A change in which no new substance is formed and only there is change in shape , size and state and color are termed as physical change.

Chemical change - A change in which new substances in form of products are formed due to occurrence of a chemical reaction is termed as chemical change.

Part II - Classification

Grinding corn into corn flour is a physical change as there is change in the state of corn but its chemical composition remains the same and no new reactions are being undergone here.

Final answer - Grinding corn into corn flour is a physical change.