A) \[CaC{{O}_{3}}\]
B) \[A{{l}_{2}}{{O}_{3}}\cdot 2{{H}_{2}}O\]
C) \[CuC{{O}_{3}}\cdot Cu{{(OH)}_{2}}\]
D) \[ZnS\]
Correct Answer: D
Solution :
\[ZnS\]is a sulphide ore, so it is roasted, not calcined. Note Calcination process is generally used in case of hydroxide and carbonates.
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