10th Class Federal Board Exams Quizzes MCQs Quizzes Federal Board Class 10th Chemistry Chapter No 6

Question:
Roasting of copper pyrites is done:

Option A):
to remove moisture and volatile impurities
Option B):
for all these
Option C):
to oxidize free sulphur
Option D):
to decompose pyrites into Cu2S and FeS

Correct Answer is Option B):
for all these