Question

What are the signs of a chemical change?

Answer 1

We know that a chemical change means the bonds are broken inside reactant atoms, and new bonds are framed inside product particles to give another substance.
We have to remember that some of the chemical reactions which are surrounding us, from the digestion of food in our body to how the light we get from the sun is the consequences of compound responses. Prior to starting with chemical reactions, it is imperative to think about physical and substance changes.

Complete step by step answer:
Some of the signs of a chemical change are as follows,
- The change in color of the substance.
- While performing some chemical reaction odor is formed.
- While performing some chemical reaction temperature also changes.
- While performing some chemical reaction gases are evolved that is bubbles are formed
- While performing some chemical reaction we get precipitate that is a solid that is formed.

Additional Information:
As we know that the combustion reaction, Decomposition reaction, Neutralization reaction, Redox Reaction, and Precipitation reaction are some of the types of chemical reactions.

Note: If a new compound is formed then it is a chemical reaction however if the substance changes its reality then it is a physical change. Iotas or particles which react together to give another substance are called reactants; the new molecules or atoms which are formed as a result of the reaction are termed as products. A compound response adheres to the law of protection of mass. That is no iota is annihilated or made except for just another product formed from reactants.