How do we know a chemical reaction has taken place?
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A chemical reaction can be characterized by one or more of the following:
1. Evolution of heat
2. Change in colour
3. Formation of precipitate
4. Evolution of gas
1. Evolution of heat
2. Change in colour
3. Formation of precipitate
4. Evolution of gas
Answered by
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Answer:
i) CHANGE IN COLOURS
ii) CHANGE IN ODOUR
iii) CHANGE IN TEMPERATURE
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