Which of the following is a chemical change?

Burning of coal

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Dissolving sugar in water

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Dissolving salt in water

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Melting of ice

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Solution

The correct option is A Burning of coal
A chemical change is the process in which chemical composition of the substance is changed. Burning of coal (that is carbon) in presence of oxygen gives a different chemical substance (carbon dioxide). So, it is a chemical change.
Dissolving sugar or salt in water, and melting of ice are physical changes as no new chemical substances are formed in the process.

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