SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Chalk is a mineral found in rocks. It contains carbon, oxygen and calcium atoms. Chalk is a ____
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element
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compound
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -As elements of chalk can not be separated by physical methods of separation and it does not have a variable composition, chalk is not a mixture.
Detailed explanation-2: -Chalk is nothing but calcium carbonate. Its molecular formula is CaCO3 C a C O 3 . Since, the constituent elements in chalk are chemically joined together in fixed proportion; therefore, chalk is a compound.
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