Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other? (CBSE AIPMT 2015)

Nitrogen dioxide and sulphur dioxidd froms acid rain. ‘Acid rain’ is the rain water containing sulphuric acid and nitric acid. (a) 3NO2 + H2O -> 2HNO3 + NO 2SO2 + 2H2O + O2 -> 2H2SO4 27 P-BLOCK ELEMENTS (GROUP 15-18) (b) NO2 and SO2 acts as a good reducing agents e.g. SO2 reduces halogens to halogen acid. Cl2 + 2H2O + SO2 -> 2HCl + H2SO4 (c) NO2 and SO2 both are soluble in water. (d) SO2 is used in the manufacture of sodium bisulphite (NaHSO3) which is used as a preservative for jams, jellies sand squashes. But NO2 is not used as preservative.