Question

Differentiate between Physical and chemical changes.

2mark Or 3mark question

class 10th​

Answer 1

Answer:

A physical change is a temporary and reversible change in which the physical properties of the substance changes without altering the composition of the substance.

A chemical change is a permanent, not easily reversible change in which the identity of the substance is altered to produce one or more new substances.

Answer 2

Answer:

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

Explanation:

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.