1.

(A) Roasting is a process in which the ore is heate in presence of air (R ) Concentration of sulphide ore is done by calcinaitonA. If both assertion and reason are true and reason is the correct explanation of assertion .B. if both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false.

Answer» Correct Answer - D
Roasting is a process in which the ore is heated in presence of air . Sulphide ores are concentrated mainly by froth floatation process.


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