Question

Substance obtained after chemical change shows different chemical properties
with respect to the original substance . Why?

Answer 1

When a substance undergoes a physical change, the atoms that make up that substance are not changed or rearranged. Chemical properties are the way substances react with others to form new substances. ... When substances undergo chemical change, the mass of the reactants will be the same as the mass of the products

Answer 2

Answer:

because the substance in chemical reaction react with other substance and the product form is a compound.

The compound form after reaction has totally new property than constituent substance.