Evolution or absorption of heat is an indicator of a chemical change.

True

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False

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Solution

The correct option is A True
A chemical change is a permanent change in which new substances are formed that are entirely different from the original substance.
It is usually accompanied by:
$∙$ change in colour
$∙$ formation of new substances
$∙$ evolution of gas
$∙$ release or absorption of energy in the form of heat or light or sound, etc.

For example: Burning of magnesium ribbon is a chemical change since new substance magnesium oxide is formed along with release of heat energy.

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