General Science - Chemistry
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Q.

The mineral containing both magnesium and calcium is:

 A.

magnesite

 B.

carnallite

 C.

calcite

 D.

dolomite

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Solution:
Option(D) is correct

Dolomite is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally $CaMg(CO_3)_2$.

The word dolomite is also used to describe the sedimentary carbonate rock, which is composed predominantly of the mineral dolomite


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