Q: Which one of the following is not an example of an oxidation reaction?
(a)The taste of butter changes if left for a longer period.
(b)A white substance is formed when an aqueous solution of barium chloride is mixed with sodium sulphate solution.
(c)A reddish-brown powder gets coated on articles made of iron.
(d)Wine gets sour with time.
Correct Answer: (c)
Detailed explanation coming soon.