CBSE Class X Science Chapterwise Quick Review
#1
A chemical reaction is a process in which the original substance(s) lose their nature and identity and form new substance(s) with different properties.

Breaking of the chemical bonds and formation of the new chemical bonds is responsible for the occurrence of a chemical reaction.

The substances which take part in chemical reaction are called Reactants.

The substances which are formed in a chemical reaction are called Products.

Examples : Where chemical reactions takes place :
(i) Digestion of food
(ii) Respiration
(iii) Rusting of iron
(iv) Burning of Magnesium ribbon
(v) Formation of curd

A chemical reaction can be identified by either of the following observations :
(i) Change in state
(ii) Change in colour
(iii) Evolution of gas
(iv) Change in temperature
(v) Formation of a precipitate

For further information download the link given below on CBSE 10th Science Chapterwise Quick Review


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