In which of the following pairs, both the minerals are oxides?

Sylvine, saltpetre

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Casseterite,litharge

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Siderite, corundrum

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Cuprite, tinstone

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Solution

The correct options are
B Casseterite,litharge
D Cuprite, tinstone
(A) Sylvine is $K C l$ and saltpetre is $K N O_{3}$ .
(B)Casseterite is tinsotne or $S n O_{2}$ and litharge is PbO.
(C) Sidrite is $F e C O_{3}$ and corundrum is $A l_{2} O_{3}$
(D) Cuprite is ruby copper or $C u_{2} O$ and tinstone is $S n O_{2}$ .
Thus in options B and D, both the minerals are oxides.

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