Question

write down the 4 observations from which you could make out whether a chemical reaction has taken place or not?​
PLZZ HELP

Answer 1

Answer:

1. Change in colour

2. Change in odour

3. Precipitate is fomed

4. Evolution of a gas

Answer 2

Answer:

1. evolution of gas
2. change of state
3. change of colour
4. formation of precipitates

Explanation:

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