What is reduced in the reaction below?2H2 + O2 2H2OA.Reduction does not occur.B.O2C.H2D.H2O

In the given reaction, 2H2 + O2 -> 2H2O, the substance that is reduced is O2.

Here's why:

In a redox (reduction-oxidation) reaction, reduction refers to the gain of electrons, while oxidation refers to the loss of electrons.

In the reaction, hydrogen (H2) is being oxidized to water (H2O), meaning it is losing electrons. On the other hand, oxygen (O2) is being reduced to water (H2O), meaning it is gaining electrons.

So, the answer is B. O2.