Question

what is a chemical change or chemical reaction​

Answer 1

Answer:

A chemical change is a change in which one or more new substance is formed. This type of change is usually irreversible

EG : rusting of iron

A chemical reaction is the reaction in which one or more chemical substances are formed from a substance

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Answer 2

$\huge\red{Hi}$

Answer:

Chemical reaction is a process in which one or more substances undergo a chemical change to form a new substance. A chemical change is also calleda chemical reaction . The substances involved in the reaction are reactants, and the new substances formed during the reactiom are called products. Energy change is one of the characterstics of a chemical change, because of formation of the new product.

For eg.formation of water...