Question

how can one say that chemical reaction is occurring ?
In answer write point i),ii),iii) & iv) (no examples)​

Answer 1

Explanation:

There are four signs that a chemical reaction has occurred: a change in color, a change in temperature, formation of a gas or formation of a precipitate.

hope it helps you ......

Answer 2

Answer:

i: colour change

ii:. Production of an odor

iii: change in temperature

iv: evolution of gas