The oxidation state of oxygen is maximum in:

• A.) bleaching powder CaOCl₂
• B.) oxygen difluoride OF₂
• C.) dioxygen difluoride O₂F₂
• D.) hydrogen peroxide H₂O₂

The oxidation state of oxygen can vary depending on the compound it is in. To determine where it has the maximum oxidation state, let's analyze the options provided.

Options Breakdown

• Bleaching Powder (CaOCl₂): In this compound, oxygen has an oxidation state of -2.
• Oxygen Difluoride (OF₂): Here, oxygen has an oxidation state of +2.
• Dioxygen Difluoride (O₂F₂): In this case, oxygen has an oxidation state of +1.
• Hydrogen Peroxide (H₂O₂): In hydrogen peroxide, oxygen has an oxidation state of -1.

Maximum Oxidation State

Among these options, the highest oxidation state of oxygen is found in oxygen difluoride (OF₂), where it is +2. Therefore, the correct answer is:

B.) oxygen difluoride (OF₂)