When calcium burns in presence of oxygen it produces -
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Calcium, Magnesium & Vitamin D helps prevent bone lose
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Explanation:
The metal reacts slowly with oxygen, water vapour, and nitrogen of the air to form a yellow coating of the oxide, hydroxide, and nitride. It burns in air or pure oxygen to form the oxide and reacts rapidly with warm water (and more slowly with cold water) to produce hydrogen gas and calcium hydroxide.
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