Question

The lowest possible oxidation state of oxygen is​

Answer 1

and 4. -2 is correct answer from this question

Answer 2

The lowest possible oxidation state of oxygen is -2 (OPTION D).

OXIDATION STATE -

• Oxygen has 8 electrons in its atom.
• The oxidation of the element is always zero.
• The oxygen has 4 electrons in its valence shell.
• It has reactivity to gain two electrons to attain a stable electronic configuration.
• This shows that either oxygen can have an oxidation state -1 or -2.
• Example - $H_2O_2$ and $H_2O$
• In $H_2O_2$ oxygen has a -1 oxidation state whereas in $H_2O$ it possess a -2 oxidation state.