Question

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Answer 1

Answer:

1. Burning of candle melts the wax and hence physical state of wax has changed from solid to liquid. Again the wax combines with the atmosphere oxygen and changes to carbon dioxide, heat and light.

5. Chemical changes cause a substance to change into an entirely new substance with a new chemical formula.

Chemical changes cause a substance to change into an entirely new substance with a new chemical formula.Chemical changes are also known as chemical reactions.

Explanation:

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