NCERT Class 10 Science Chapter 1 Chemical Reactions and Equations

NCERT CBSE Board Solution for Class 10 Science Chapter 1 Chemical Reactions and Equations notes video and question-answer and chapter related all best resource.

Chemical Reactions and Equations

Why should a magnesium ribbon be cleaned before burning in air ?

Magnesium gets covered with a layer of magnesium oxide when kept in air for a long time. This layer hinders the burning of magnesium. Hence, it is to be cleaned before burning.

Change in State

(i) Physical Change (ii) Chemical Change

Chemical Equation and Balanced Chemical Equation

A balanced chemical equation has an equal number of atoms of different elements in the reactants and products.
The chemical equations should be balanced to satisfy the law of conservation of mass.

Types of Chemical Reaction

i. Combination Reaction
ii. Decomposition Reaction
iii. Displacement Reaction
iv Double Displacement Reaction
v Redox Reaction


It is an undesirable change that occurs in metals when they are attacked by moisture, air, acids, and bases.
Example: Corrosion (rusting) of Iron: Fe2O3.nH2O (Hydrated iron oxide)


The taste and odor of food materials containing fat and oil change when they are left exposed to air for a long time. This is called Rancidity. It is caused due to the oxidation of fat and oil present in food materials.

Methods to prevent rancidity

By adding anti-oxidant.
Vacuum packing.
Replacing air by nitrogen.
Refrigeration of foodstuff.

NCERT Solutions for Class 10 Science Chapter 1 chemical reactions and equations Video Notes

Class 10th Science Other Chapter Solutions

NCERT Solution for Class 8 

NCERT Solutions for Class 9

NCERT Solution for class 10


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