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Physical and Chemical Changes — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes3 Marks
Question
Give two examples for each of the following cases
(i) Physical changes, which are reversible.
(ii) Physical changes, which are not reversible.
(iii) Chemical changes
✓

Answer

(i) (a) Folding of paper $\quad$ (b) Melting of ice
(ii) (a) Tearing of paper $\quad$ (b) Breaking of glass
(iii) (a) Reaction between vinegar and baking soda.
(b) Burning of a matchstick.

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