Changing colors is not an indication of a chemical change.
a. true
b. false

True

A color change does not always indicate that a chemical change has occurred since there are other factors that can contribute to a change in color.

An example of a color change due to a chemical reaction is when a half eaten apple turns brown after it has been exposed to the air.

But, changing the color of a metal does not change its physical properties.

Hence we cannot say that changing color is an indication of a chemical change.

Hope this helps.

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