Chemistry, asked by atiqurdj9882, 1 year ago

State any two observation in an activity which may suggest that a chemical reaction has taken place. Give one example to support the answer

Answers

Answered by PrateekStar1
2
we can know if a chemical reaction had taken place :
1. if colour changed is observed or the change in odour ( smell ) is observed .
2. if the heat is evolved .
3. if a new substance is formed as in case of formation of ashes in burning of coal
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