Question

Generally metallic oxides are basic and non-metallic oxides are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red? Give reason
(a) sulphur dioxide

(b) magnesium oxide
(c) iron oxide
(d) copper oxide

Answer 1

Answer:

(a) sulphur dioxide. is correct answer

Explanation:

Sulphur dioxide is an acidic gas and this can easily be demonstrated by adding water and a few drops of universal indicator to a container of the gas. The resulting acid is the weakly dibasic acid sulphurous acid (H2SO3).

SO2 (g) SO2 (aq)

SO2 (aq) + H2O (l) H2SO3 (aq)