Question

all definitions of chapter 1 of science class 10

Answer 1

Explanation:

is available on Google

Answer 2

Answer:

chemical reactions are the processes in which new substances with new properties are formed.

the substances which take part in a chemical reaction are called reactants

the new substances produced as a result of chemical reaction are called products

characteristics of chemical reactions-

1 evolution of a gas

2 formation of a precipitate

3 change in colour

4 change in temperature

5 change in state