Potassium super oxide is the inorganic compound with the formula KO2. It is a yellow solid that decomposes in moist air. It is a rare example of a stable salt of the super oxide ion. Which of the following statement is incorrect regarding potassium super oxide :
(a) Oxidation state of oxygen in KO2 is –1/2
(b) Oxidation state of potassium is +1
(c) It is used in preparation of breathing mask
(d) It is a reducing agent
