Question

Identify the following reactions as either oxidation or reduction- [3]

a. O + 2e-

----> O2-

b. 2Mg + O2 ----> 2MgO

c. Fe3+ + e-

----> Fe2+​

Answer 1

Answer:

A) reduction.

B) oxidation.

C) reduction.

Explanation:

in the 1st and 3rd case, there is the addition of two electrons and we know the addition of electrons is simply the reduction of species.

in the case of  2nd Mg changes its oxidation state from 0 to +2.so it is an oxidation reaction.