Q26 / 160 · AP EAMCET 2019 (20 Apr Shift 1) · Chemistry

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

  • A
    I, II, III
  • B
    II, III, IV
  • C
    I, II only
  • Correct answer
    D
    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.

Hence, the correct answer is option: 'D'.

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