Question

How do you confirm that their is a chemical reaction between two substance(short answer)

Answer 1

Hi,
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Here is your answer,
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The following ways are :
1. Evolution of gas.
2. Formation of precipitate.
3. Evolution of heat.
4. Change in color, etc.

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HOPE YOU WILL UNDERSTAND MY WORDS, a request is here please as I am an ACE ranker I wish that to make my way easy for the GENIUS rank you should mark my answer brainlest if you wish then only ☺.
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Answer 2

When we get the new product from those substance than it will be conformed that the chemical reaction has taken place