Question

What is a phyiscal and chemical change

Answer 1

Physical change is when change occur physically in a substance. It is usually reversible. It includes change in colour, shape, texture, volume etc.

Examples: Cutting of paper, making moulded stuff from dough etc.

Chemical change is when change occurs chemically in a substance. It is non-reversible. When ever a physical change happens, a new substance if formed.

Examples: Burning of paper, transformation of milk into curd etc.

Answer 2

a physical change is changing from one state to another without a change in chemical composition. (ex. freezing, melting, boiling a substance)

a chemical change occurs when one or more substances change into entirely new substances with different properties