Which of the following reactions occur during calcination?
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a
CaCO3 â CaO + CO2
b
2Al(OH)3â¶Al2O3+3H2O
c
4FeS2+11O2â¶2Fe2O3+8SO2
d
Cu2S+2CuOâ¶4Cu+SO2
answer is L.
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Detailed Solution
Reactions (1) and (2) represent calcination process, whereas (3) is roasting as reduction is done by heating in presence of O2 and (4) is auto-reduction process.