Question

what is chemical change ? define with correct sentence?

Answer 1

hey mate!!

here is u r answer!!!

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a permanent change ,in which the physical and chemical property of matter change and new substance are formed which do not get back into their original firm by reversing the reaction is called chemical change.

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example.
curdling of milk , formation of rust iron.

ok help u..

Answer 2

Chemical changes involve Chemical reactions which form new substances with different properties and are irreversible.There is mostly a change in colour,odour and temperature. Eg.
Burning of wood
Cooking of an egg