Question

How Neha can determine that chemical reaction has happened ​

Answer 1

Answer:

We can tell if a chemical reaction has taken place when one or more of the following things happen: There has been a colour change inside the reaction flask. A gas has formed. Usually we know a gas has formed when we can see bubbles.

Answer 2

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HERE IS UR ANSWER

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We can tell if a chemical reaction has taken place when one or more of the following things happen: There has been a colour change inside the reaction flask. A gas has formed. Usually we know a gas has formed when we can see bubbles