Question

difference between physical and chemical changes ​

Answer 1

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.

Hope it helps you ♥️

Answer 2

$\huge\bf{Answer :}$

★Physical changes:-

• Only the physical properties of a substance change during physical change.

• No new substance is formed in a physical change.

• Most of the physical changes are reversible.

• Almost all physical changes are temporary.

★Chemical changes:-

• A new substance is formed in a chemical change.

• A chemical change is a permanent change.

• It is an irreversible change.

• Both the physical and chemical properties of the substance change during a chemical change.

▭▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬

★For short differentiation:-

$\sf\green{Physical \ changes:-}$

• New substance is not formed.

• The nature of change is temporary change.

• Reversibility is reversible.

$\sf\red{Chemical \ changes:-}$

• New substance is formed.

• The nature of change is permanent change.

• Reversibility is irreversible.

▭▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬▭▬

★ $\small\bf{Definition :}$

• Physical changes - A change in the physical properties of a substance.

• Chemical change - A change in the composition and chemical properties of a substance.