Chemical reactions and equations

 Chemical reactions and equations 

1. Write a balanced chemical equation with state symbols for the following reactions.Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.
2. Explain the Oxidation and Reduction?
3. What is the Corrosion?
4. Explain the Double Displacement Reaction and Decomposition Reaction with an example?