CBSE Class 10 Chemistry Chemical Reactions and Equations
Chemical Reactions
Define chemical reaction and explain its various characteristics.Chemical Equations
The chemical reactions can be represented with the help of symbols and formulas in the form of equation.
The chemical equations must follow the Law of conservation of mass and therefore should always be balanced.Combination and Decomposition Reaction
In combination reactions two or more substances combine to form one product.
Combination reactions can be between two elements, an element and a compound or between two compounds.
Decomposition reactions are those reactions in which a compound breaks or splits into two or simpler substances.Types of Displacement Reactions
Displacement reactions are those reactions in which a more reactive element takes the place of another element from its salt solution.
The reactions where two compounds react by exchange of ions to form two new compounds are called Double displacement reaction.
One of the products of double displacement reaction is insoluble; therefore they are also referred as precipitation reaction.Redox Reactions
The reactions in which Oxygen is added or Hydrogen is removed are called oxidation reaction.
Reduction reaction either involves addition of hydrogen or removal of Oxygen.
The substance which is oxidised is the reducing agent, while the substance reduced, is the oxidising agent.
