indian geography
Chemical reaction and equation
Chemical Reaction: The transformation of chemical substance into another chemical substance is known as Chemical Reaction. For example: Rusting of iron, the setting of milk into curd, digestion of food, respiration, etc. In a chemical reaction, a new substance is formed which is completely different in properties from the original substance, so in a chemical reaction, a chemical change takes place. Only a rearrangement of atoms takes place in a chemical reaction. · The substances which take part in a chemical reaction are called reactants. · The new substances produced as a result of a chemical reaction are called products. Example: The burning of magnesium in the air to form magnesium oxide is an example of a chemical reaction. 2Mg(s) + O 2 (g) △ → 2MgO(s) Before burning in air, the magnesium ribbon is cleaned by rubbing with sandpaper. This is do...
Comments
Post a Comment