Among the following statements, the incorrect statement is:

calamine and cerrusite are carbonate ores

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rutile and cuprite are oxide ores

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zinc blende and pyrites are sulphides of

C u

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malachite and azurite are sulphate ores of

C u

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Solution

The correct options are
C zinc blende and pyrites are sulphides of $C u$
D malachite and azurite are sulphate ores of $C u$
(A) Calamine is $Z n C O_{3}$ and Cerussite is $P b C O_{3}$ . Thus, option A is correct.
(B) Rutile is $T i O_{2}$ . Cuprite (Ruby copper) is $C u_{2} O$ .
Thus, option B is correct.
(C) Zinc blend is ZnS. Copper pyrite is $C u F e S_{2}$ .
Thus, option C is incorrect.
(D) Malachite is $C u (O H)_{2} . C u C O_{3}$ and Azurite is $C u (O H)_{2} .2 C u C O_{3}$ .

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