Questions
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
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Correct option is L
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.Similar Questions
When the sample of Cu with Zn rqnpurity is to be purified by electrolysis, the appropriate electrodes are
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