A) calamine
B) cryolite
C) cassiterite
D) malachite
Correct Answer: A
Solution :
(a) Calamine \[(ZnC{{O}_{3}})=\] ore of zinc (b) Cryolite \[(N{{a}_{3}}Al{{F}_{6}})=\]ore of aluminium (c) Cassiterite \[(Sn{{O}_{2}})=\] ore of tin (d) Malachite \[\{CuC{{O}_{3}}.Cu{{(OH)}_{2}}\}=\] ore of copper
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