Question

Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other?
(a) is a reducing agent
(b) is soluble in water
(c) is used as a food-preservative
(d) forms 'acid-rain'

Answer 1

C) used as a preservative.

So2 is used as a food preservative as it is an antioxidant and prevents spoiling of food to some extent. However NO2 is not used in preserving food.