Which method of testing substances is a sure way to identify a chemical reaction? a. change in color
b. formation of bubbles
c. change in density
d. increase in temperature
e. solubility in water

it can only be one! ! im desperate!

Answer B is the most plausible answer

Explanation:

The reason is because when chemical reactions take place, bubbles form to show the energy from the chemical bonds that are taking place.

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.