Answer:
Correct option is C.
Explanation:
Such type of chemical reaction that involves a transfer of electrons between two species is known as oxidation-reduction or redox reaction.
Redox reaction is oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.
For this reaction:
On reactant side:
Oxidation state of oxygen, cobalt, lithium = -2 ,+2, 0
While on product side of reaction:
Oxidation state of cobalt, oxygen, lithium = 0, -2, +1
Here, oxidation reaction take place because oxidation state of lithium is increased. While the oxidation state of cobalt in reducing, it is gaining electrons and so it undergoes reduction reaction.
So, Option C (Li) is correct.
Learn more about oxidation-reduction reaction:
brainly.com/question/13293425
#SPJ4
