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Differentiate between cacination and roasti g.give …

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Differentiate between cacination and roasti g.give 5 points

Posted by ?????????? Do??? 7 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Mukesh Singhal 7 years, 1 month ago

Roasting vs Calcination Roasting Calcination One is heated in the presence of excess of oxygen or air. one is heated in the absence or limited supply of oxygen or air This method is employed for sulphide ores. This method is employed for carbonate ores. Sulphur dioxide is produced along with metal oxide. Carbon dioxide is produced along with metal oxide. Example: For the ores ZnS (sphalerite) and Cu2S (chalcocite), balanced equations for the roasting are: 2ZnS+3O2-->2 Zno+ 2SO2 2 Cu2S + 3O2 → 2 Cu2O + 2 SO2 Example: ZnCO3--> ZnO+ C02

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