Is the given material comes under the category of "pure substance" or not? - Calcium oxide.
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yes calcium oxide is a pure substance. .
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The give material Calcium Oxide comes under the category of 'Pure Substance'. Calcium oxide is formed by fusing the elements calcium and oxygen.
Now a pure substance is a substance which cannot be separated into its constituent atoms by any physical means.
Calcium oxide can only be separated using chemical means and therefore is a pure substance.
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