Question

which one of the following is a Redox reaction?

Answer 1

One way to understand if it is a redox reaction is to see the oxidation number before and after the reaction.

If the oxidation number is greater in the product, then it lost electrons and the substance was oxidized. If the oxidation number is less, then it gained electrons and was reduced.

So the answer is c.

Answer 2

(c) is the ans i mean it is a redox reaction