Chlorine reacts with cold dilute caustic soda to give sodium chloride, sodium hypochlorite and water.

Explanation

(a) The skeleton equation is written as
`Cl_(2)+NaOH to NaCl+NaOCl+H_(2)O`
(b) Focusing on the oxidation numbers
`overset(Cl_(2))+overset(+1)(Na) overset(-2)(O) overset(+1)(H) to overset(+1)(Na) overset(-1)(Cl)+ overset(+1)(Na) overset(-2) (O) overset(+1) (Cl) +overset(+1)(H_(2)) overset(-2) O`
(c) Locating atoms undergoing change in oxidation numbers.
`overset(0)(Cl_(2))+NaOH to Na overset(-1)(Cl)+NaO overset(+1)(Cl)+H_(2)O`
(d) Determining the change in oxidation numbers

(e) Cris- crossing these changes in the oxidation numbers
`Cl_(2)+NaOH to NaCl +NaOCl+H_(2)O`
(f) Balancing the atoms other than hydrogen and oxygen
`Cl_(2)+2NaOH to NaCl+NaOCl+H_(2)O`
This is balanced equations.