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An Intiative by Sri Chaitanya
a
Roasting removes easily oxidisable volatile impurities like arsenic as As2O3, antimony as Sb2O3, and sulphur as SO2
b
The release of SO2 (in roasting process) has been a serious air pollution problem
c
In roasting process, if temperature is fairly low (about 500∘C and the concerntration of SO2 in the gaseous environment is more, suphate may be produced, that is stable, and high temperature is needed to decompose it
d
All the correct
e
Litharge
f
Galena
g
Sesquioxide
h
None of these
i
Cu2O
j
CuO
k
Cu2O
l
CuS
answer is , , .
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