Question

Oxidation number of oxygen is ___________ in H2O.

(a) +1 (b) +2

(c) -2. (d) -1​

Answer 1

Answer:

+2

Explanation:

In our water example, hydrogen is assigned an oxidation number of +1 because each individual hydrogen has "lost" one electron. Oxygen has an oxidation number of +2 because the single oxygen atom has "gained" a total of two electrons, one from each hydrogen.

Answer 2

a) +1

There is one atom of oxygen in water (H2O)

Hope it helps.