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Minerals, Ores and their Formation

Which of the ...

Question

Which of the following is a basic carbonate mineral?
i) Malachite ii) Dolomite
iii) Azurite iv) Magnesite

i, iii and iv

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ii, iii and iv

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i and iv

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iii and iv

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Solution

The correct option is A i, iii and iv
Malachite is a copper carbonate hydroxide mineral, with the formula $C u C O_{3} . C u (O H)_{2}$ .
Azurite is one of the two basic copper(II) carbonate minerals, with formula $C u_{3} (C O_{3})_{2} (O H)_{2}$ .
Magnesite is just the common name for magnesium carbonate, with the formula $M g C O_{3}$ .

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