The characteristics of chemical changes are: (i) temporary, reversible and a new substance is produced
(ii) always accompanied by exchange of light.
(iii) permanent, irreversible and a new substance is produced.
(iv) may accompanied by exchange of light or heat energy.
(A) i, ii, iii and iv
(B) ii, iii and iv
(C) iii and iv
(D) i, ii and iii
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the is (B) MAY IT HELP YOU
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