types of reactions

Combination Reaction: If in a Chemical equation, two or more reactants combine to form a single product then it is known as combination reaction.

Decomposition reaction: If in a chemical reaction a single substance decomposes to form two or more substances then it is known as decomposition reaction.

Displacement Reaction: If in a chemical equation, more reactive elements displaces a less reactive element from its compound then it is known as displacement reaction.

Double displacement reaction: If in a chemical reaction exchange of ions takes place then it is known as double displacement reaction

Precipitation Reaction: A white coloured substance which is insoluble in water also known as precipitate is formed during a chemical reaction then the reaction is known as precipitation reaction

In this reaction Barium sulphate is a white colour precipitate.
Oxidation Reaction: It is a chemical reaction in which gain of oxygen or loss of hydrogen takes place. For example in the following reaction copper is oxidised to become copper oxide.

Reduction Reaction: It is a chemical reaction in which loss of oxygen or gain of hydrogen takes place. For example in the following reaction copper oxide is reduced to become copper.

Redox Reaction or Oxidation-Reduction reaction: The chemical reaction in which both oxidation and reduction takes place is known as Redox reaction. For example in the following reaction Hydrogen is oxidised to become water and copper oxide is reduced to become copper.