Question

A colour change does not necessarily indicate a chemical reaction.

• A. True
• B. False

Answer 1

The correct option is A True

1. A change in temperature, color, etc. when two or more reactants is mixed, is noticed as a chemical change is probably occurring.
2. A change in color is not always indicates a chemical change.
3. Color change is one of the characteristic of a chemical reaction taking place.
4. For example, if we observe the rusting of iron over time, one would realize that the metal has changed color and turned orange. However, sometimes a change in color occurs simply by mixing of two colors, but no real change in the composition of the substance.
5. On the other hand, when we add red ink to water, it will turn red. However, we would indicate that as a physical change.

Therefore, the given statement- A colour change does not necessarily indicate a chemical reaction is true.