Oxygen

Subject: Science

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Oxygen is abundantly occurring element on the earth. It constitutes about 47.6% of the earth’s crust.
Oxygen gas can be prepared in the laboratory by hydrogen peroxide and manganese dioxide.
Metals burn with oxygen and produce their oxides.
Oxygen is required for oxidation of food to produce energy during respiration.
Oxygen is non-combustible gas but it is combustion supporter.