Which of the following processes are examples of oxidation?A formation of MgOB killing bacteria with C refining iron oreD rusting of iron

The processes that are examples of oxidation are:

A. Formation of MgO: This is an example of oxidation because magnesium (Mg) is losing electrons to oxygen (O) to form magnesium oxide (MgO). In this process, magnesium is oxidized.

D. Rusting of Iron: Rusting is an oxidation process where iron (Fe) reacts with oxygen (O) in the presence of water (H2O) to form iron(III) oxide (Fe2O3), commonly known as rust. In this process, iron is oxidized.

B. Killing bacteria with C: This is not an example of oxidation. Oxidation involves a loss of electrons, which is not what's happening in this process.

C. Refining iron ore: This process involves several steps, some of which may involve oxidation, but as a whole, it's not accurate to say that refining iron ore is an example of oxidation. It's a more complex process that involves both oxidation and reduction reactions.