Which of the following statements is not true ?
A. Rocks are made up of chemical substances called minerals.
B. We can find the composition of a rock.
C. A rock may contain more than one mineral.
D. None of these
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Answer:
b) We can find the composition of a rock
Explanation:
a rock is composed of one or more minerals and sometimes mineraloids but do not have a crystal structure. A mineral is a chemical substance made up of one or more chemicals having a definite crystal structure. Rocks do not have a definite chemical composition whereas minerals do.
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