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26 August, 07:50

Which statement about a chemical reaction is true?

It occurs only at low temperatures.

It occurs only at high temperatures.

It occurs whenever a physical change takes place

It occurs whenever a chemical change takes place.

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  1. 26 August, 11:50
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    It occurs whenever a chemical change takes place.

    Chemical reactions occur when chemical, or physically irreversible, changes take place.
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