Fewpal
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Which one of the following reactions represents a calcination reaction? 

(A) HgS + O2 → Hg + SO2 

(B) Ag2S + NaCl → AgCl + Na2

(C) CuCO3.Cu(OH)2 → CuO + CO2 + H2

(D) Al2O3 + NaOH → NaAlO2 + H2

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(C) CuCO3.Cu(OH)2 → CuO + CO2 + H2O

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