Question

how is caustic soda pbtained from common give any four uses of caustic soda​

Answer 1

caustic soda is called NaOH.

it can be prepared as :

NaCl + H2O --------> NaOH + HCl

from common salt .

Answer 2

1)In detergents and soaps

2)In paper making

3)In bleach manufacturing

4)In bauxite purification