Question

Which of the following shows oxidation state of +8?

Options

• Ir

• Pt

• Rh

• Os

Answer 1

Os

Explanation:

Among the given elements, osmium (Os) is the only one that shows an oxidation state of +8, which is also the highest known oxidation state for any element. This oxidation state is seen in osmium tetroxide (OsO₄). Other elements such as Ir, Pt, and Rh do not exhibit the +8 oxidation state.