What are the different types of …

Chemical reactions can be classified in following types:

• Combination Reaction

  Example: When magnesium is burnt in air (oxygen), magnesium oxide is formed. In this reaction, magnesium is combined with oxygen.

  Mg + O₂  → 2MgO

• Decomposition Reaction
  Example: When calcium carbonate is heated, it decomposes into calcium oxide and carbon dioxide
  CaCO₃  → CaO + CO₂

• Displacement Reaction
  Example: When zinc reacts with hydrochloric acid, it gives hydrogen gas and zinc chloride.Zn + 2HCl  → ZnCl₂ + H₂

• Double Displacement Reaction

  Example: When solution of barium chloride reacts with the solution of sodium sulphate, white precipitate of barium sulphate is formed along with sodium chloride.

  BaCl₂ + Na₂SO₄  → BaSO₄ + 2NaCl

• Oxidation and Reduction Reaction

  When sodium hydroxide reacts with hydrochloric acid, it gives sodium chloride and water.

  NaOH + HCl  →  NaCl + H₂O