Potassium on exposure to air gives:

Potassium peroxide

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Potassium superoxide

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Potassium dioxide

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Potassium oxide

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Solution

The correct options are
A Potassium superoxide
B Potassium peroxide
D Potassium oxide
Potassium is an extremely active metal that reacts violently with oxygen in air. Potassium oxidizes faster than most metals and forms oxides with oxygen-oxygen bonds. Three species are formed during the reaction: potassium oxide, potassium peroxide, and potassium superoxide.
$8 K + 4 O_{2} \to 2 K_{2} O + 2 K O_{2} + K_{2} O_{2}$

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Similar questions

Ethyl alcohol on oxidation with acidified potassium permanganate gives:

	List I		List II
I.	Iron	A.	Liquid at room temperature
II.	Copper	B.	Deposition of reddish -brown layer on exposure to moist air
III.	Potassium	C.	Can be cut easily with a knife
IV.	Mercury	D.	Formation of a greenish layer on exposure to moist air

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