A) Bayer's method - \[N{{a}_{2}}C{{O}_{3}}\]
B) Matte - 98% \[C{{u}_{2}}S+2\]% \[FeS\]
C) van Arkel method - AgI
D) Thomas slag - Raw material for cement industry
Correct Answer: B
Solution :
[b] Roasted mass obtained from roasting step is called matte. (98% \[C{{u}_{2}}S+2\]% \[FeS\])
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