Which oxide is formed when potassium is heated in excess of oxygen?

K_{2} O

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K_{2} O_{2}

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K O_{2}

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Solution

The correct option is D $K O_{2}$
Burning K in excess $O_{2}$ gives the superoxide $K O_{2}$ .Reaction with a large excess of metal will form the Oxide $K_{2} O$ . The superoxide reacts with water to form the peroxide, $K_{2} O_{2}$ , at low T and the oxide at higher T both with liberation of $O_{2} .$
Hence option D is correct answer.

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Which oxide is formed when potassium is heated in excess of oxygen?

The correct option is D KO2Burning K in excess O2 gives the superoxide KO2.Reaction with a large excess of metal will form the Oxide K2O. The superoxide reacts with water to form the peroxide, K2O2, at low T and the oxide at higher T both with liberation of O2.Hence option D is correct answer.