Which of the following are carbonate ores? I. Magnetite II. Kaolinite III. Siderite IV. Calamine

Which of the following are carbonate ores? I. Magnetite II. Kaolinite III. Siderite IV. Calamine
  1. I, II, III
  2. II, III, IV
  3. I, II only
  4. III, IV only

Solution

(I) Magnetite \(\longrightarrow \mathrm{Fe}_3 \mathrm{O}_4\) (II) Kaolinite \(\longrightarrow \mathrm{Al}_2 \mathrm{Si}_2 \mathrm{O}_5(\mathrm{OH})_4\) (III) Siderite \(\longrightarrow \mathrm{FeCO}_3\) (IV) Calamine \(\longrightarrow \mathrm{ZnCO}_3\) (III), (IV) both are carbonate ores. Thus, option (4) is correct.

Asked in: AP EAMCET 2019 (20 Apr Shift 1)

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