Question

1 ) What is difference between Chemical change and physical changes ?​

Answer 1

Answer:

Physical change Chemical change

Only physical changes like odour, physical state, density, volume etc. changed and chemical properties remain unchanged The chemical composition and chemical properties undergo a change

No new substance is formed in a physical change. A new substance is formed in a physical change.

Very little or no energy in the form of heat, light or sound is usually absorbed or given out in a physical change A chemical change is always accompanied by absorption or evolution of energy

It is a temporary change It is a permanent change

The original form of substance can be regained by simple physical method Original substance cannot be obtained by simple physical method

It is reversible It is irreversible

Answer 2

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$\purple{\boxed{\mathbb{\purple{\dag{ANSWER↬}}}}}$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.

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