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The reaction that does NOT define calcinations is:-

a.

ZnCO3   Zno + CO2

b.

Fe2O3.XH2O  Fe2O3.+ XH2O

c.

CaCO3MgCO3CaO + MgO + 2CO2

d.

2Cu2S + 3 O2  2Cu2O + 2 SO2



Question ID - 52248 | SaraNextGen Top Answer

The reaction that does NOT define calcinations is:-

a.

ZnCO3   Zno + CO2

b.

Fe2O3.XH2O  Fe2O3.+ XH2O

c.

CaCO3MgCO3CaO + MgO + 2CO2

d.

2Cu2S + 3 O2  2Cu2O + 2 SO2

1 Answer
127 votes
Answer Key / Explanation : (d) -

Calcination in carried out for carbonates and oxide ores in absence of oxygen. Roasting is carried out mainly for sulphide ores in presence of excess of oxygen.

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