Question

How can you tell whether a Chemical Reaction has Taken Place?

Answer 1

Answer:

A chemical reaction Has Many indicators:

1) Change in state

2)Change in temperature

3) Evolution of gas

4) Change in colour

5) Formation of precipitate

These Indicators indicate of a chemical reaction has taken place .

Answer 2

In this question, we are asked to tell how one can identify whether a chemical reaction has taken place.

• In a chemical reaction, one or more substances also known as reactants are changed into one or more additional substances also known as products. Chemical elements or chemical compounds make up substances.
• When one or more of the following occur, we can determine whether a chemical reaction has occurred: the reaction flask's color has changed. Gas has developed. Typically, the presence of bubbles indicates that gas has formed.
• Any of the following alterations can be used to prove that a chemical reaction has occurred.
• Creation of new materials
• (ii) State change
• (iii) A variation in color
• (iv) A shift in the temperature
• (v) Precipitate formation
• (vi) A gas's evolution
• For instance, we can state that a chemical reaction has occurred if a gas is produced after the combination of two substances.

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