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Chemical change: A chemical reaction is the change of one chemical substance into another chemical substance. For instance: The rusting of iron, the curdling of milk, the digestion of food, breathing, etc.

What is a chemical reaction?

  • A chemical reaction results in a chemical change because a new material has entirely different properties from the original substance. In a chemical reaction, atoms rearrange themselves.
  • Reactants are the chemicals that participate in a chemical reaction.
  • Products are the new compounds created as a result of a chemical process.  
  • An illustration of a chemical reaction is burning magnesium in the air to produce magnesium oxide.
  • 2Mg(s) + O2(g) △→ 2MgO(s)
  • The magnesium ribbon is cleaned with sandpaper before being burned in the air. This cleans the magnesium ribbon's surface of the basic magnesium carbonate protecting coating.
  • Reactant: Materials that participate in a chemical reaction are referred to as reactants.
  • Mg and O2, as an example.
  • A product is a newly created substance that results from a chemical reaction.
  • Example: MgO.

A chemical reaction is the change of one chemical substance into another chemical substance.

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Chemical  change is the change  chemical substance is transformed into another chemical substance.It is irreversible in  nature , for example Reaction of medicine in body , milk to curd etc.

What is the difference between chemical and  Physical change?

1)Physical change temporary or reversible in nature but chemical change is irreversible in nature

2)In physical change there no new product is formed but in chemical change there formation of new product takes .

3) Physical change is change sin shape ,size or state for example freezing of water , melting of wax , and example of  Chemical change are Burning of  coal, digestion of food

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