Essential Chemistry for IGCSE - Chemical Changes (Section 2 - No. 42)
Which of the following statements are correct about the comparison of chemical changes and physical changes?
Chemical changes form new substances, physical changes do not.
Chemical changes are always easily reversible, physical changes are not.
Physical changes can involve a change of state.
Chemical change can involve the release of energy.
Explanation
Physical changes do not produce new substances; they only change the form. Chemical changes often involve energy transfer, and result in new substances.
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