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21 February, 06:46

Which one of the following statements is true?

A. Neither chemical nor physical changes involve a change in appearance.

B. Both chemical and physical changes can involve a change in appearance.

C. Only chemical changes involve a change in appearance.

D. Only physical changes involve a change in appearance.

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  1. 21 February, 07:13
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    B. Because chemical changes (for example, burning turning something into ashes) can change it's appearance while physical changes (for example, crumpling a piece of paper) can aswell.
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