Give three examples in which green chemistry has been applied ?

Explanation

(i)In dry cleaning, use of liquefied `CO_2` in place of tetrachloroethene `(Cl_2C =C Cl_2)`.
(ii) In bleaching of paper using `H_2O_2` in place of chlorine.
(iii)In the manufacture of chemicals like ethanal using environment-friendly chemicals and conditions