Question

Generally metallic oxides are basic and non-metallic oxides are acidic in nature.
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?
(a) sulphur dioxide
(b) magnesium oxide
c) iron oxide
(d) copper oxide.​

Answer 1

Blue lithmus changing to red is an indication of acidic solution

here a) Sulphur dioxide is an acidic oxide