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An Intiative by Sri Chaitanya
a
The complete process of extracting the metal from its ores is called metallurgy.
b
Calcination is the process of heating the ore strongly in the absence of air.
c
An ore of tin containing FeCrO4 is concentrated by electromagnetic separation
d
Sodium cyanide solution is used to extract Ag or Al from its ores.
answer is D.
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