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Q.

Which of the following is not an ore of Mg ?

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a

Gypsum

b

Magnesite

c

Dolomite

d

Carnallite

answer is D.

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Detailed Solution

Carnallite is $K C l . M g C l_{2} . 6 H_{2} O$

Magnesite is $M g C O_{3}$

Dolomite is $M g C O_{3} . C a C O_{3}$

Gypsum is $C a S O_{4} . 2 H_{2} O$

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