how to make iodine solution,copper sulphate,caustic soda

Iodine solution-
Iodine in solid state is of lustrous metallic gray colour. It can be dissolved in water to form iodine solution.
Copper sulphate-
Copper sulphate is chemical compound and is available as blue colour powder. It is industrially prepared by copper metal and sulphuric acid.

Caustic soda-
Caustic soda is chemically known as sodium hydroxide. It is available as white coloured waxy pellets. It can be prepared by Solvay process, about which you will study in higher classes.

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