Answer:-
Chlorine gas is passed through a solution of flower to
decolourise the flower
Explanation:
Chlorine is used as a bleaching agent because of its oxidising nature.
[tex]Cl_{2}+H_{2}O\rightarrow HCl +HOCl[/tex]
[tex]HOCl\rightarrow H_{2}+O[/tex]
This nascent "O" is highly reactive in nature and bleaches the substance that comes into its contact.
when flowers are passed through the chlorine solution , it oxidises the solution and removes the colour from the flower.
This property also made its use as water-disinfectant reagent.
Chlorination is done to make the water useful for drinking
It kills the harmful bacteria present in the water.