Question

Which of the following are carbonate ores? l) Magnetite II) Kaolinite III) Siderite IV) Calamine

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

Answer 1

Answer: (D)

III, IV only

Answer 2

(I) Magnetite $\longrightarrow Fe _{3} O _{4}$

(ii) Kaolinite $\longrightarrow Al _{2} Si _{2} O _{5}( OH )_{4}$

(III) Siderite $\longrightarrow FeCO _{3}$

(IV) Calamine $\longrightarrow ZnCO _{3}$

(III), (IV) both are carbonate ores.