Which one of the following is a physical change?

Burning of coal
Burning of wood
Heating of a platinum crucible
Heating of potassium chlorate

Correct Answer: Heating of a platinum crucible

Explanation:

In Burning of coal, burning of wood and Heating of Potassium Chlorate there will be some sort of chemical change, but Heating of a Platinum crucible is a physical change.

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