A) Bauxite
B) Malachite
C) Zinc blende
D) Pig iron
Correct Answer: D
Solution :
Pig iron ® It is the most impure form of iron and contains highest proportion of carbon \[(2.5-4%)\] \[\text{Malachite}\to Cu{{(OH)}_{2}}.CuC{{O}_{3}}\] \[\text{Zinc}\,\,\text{blende}\to ZnS\] \[\text{Bauxite}\to A{{l}_{2}}{{O}_{3}}.2{{H}_{2}}O\]
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