Question

how change in colour can be identified


PLEASE GIVE SHORT ANSWER​

Answer 1

Explanation:

This is a reversible redox reaction. Sometimes a change in color is simply the mixing of two colors and not due to a change in the composition of the substances used. For example, putting red food coloring and blue food coloring in a beaker of water results in purple water, but no chemical reaction has occurred.

Answer 2

Explanation:

Color changes from blue to light green. Copper reacts with oxygen, H2O and CO2 to give copper carbonate, which changes color from brown to blue or blue green. Rusting, blackening of surfaces of cut vegetables and fruits are other examples of change of color in a chemical reaction.