What are the characteristics of a chemical change?
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characteristics of a chemical reaction-
(i) Heat change occurs( increase or decrease) temperature change
(ii) Evolution of a gas
(iii) change in physical state
(iv) change in colours may occur.
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Answer:
Color Change.
Production of an odor.
Change of Temperature.
Evolution of a gas (formation of bubbles)
Precipitate (formation of a solid)
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