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Name one metal each occurring as : (a) A sulphide (b) A carbonate (c) An oxide

Name one metal each occurring as :
(a) A sulphide
(b) A carbonate
(c) An oxide
Ans. (a) Iron Sulphide (FeS)
(b) Calcium carbonate (CaCO3)

(c) Aluminium oxide (Al2O3)
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