AP Police Constable Prelims 6-Nov-2016 Solved Paper

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Question : 86 of 200

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Which of the following processes represents 'roasting'?

Fe₂O₃ + 3C $→ ↖{∆ }$ 2Fe + 3CO
2PbS + 3O₂ $→ ↖{∆ }$ 2PbO + 2SO₂
ZnCO3 $→ ↖{∆ }$ ZnO + CO2
Al₂O₃ . 2H₂O $→ ↖{∆ }$ Al₂O₃ + 2H₂O

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