Carbonate ores are usually subjected to calcination, while sulphide ores are subjected to roasting. Comment on the statement.

Sulphide ores are common for the metals

Tadpole is ammonotelic while the frog is ureotelic. Comment on this statement.

Which metals have sulphide ores?

Carbonate ore of iron is______.

Why is it advantageous to roast a sulphide ore before reduction?

Roasting and calcination are usually carried out in,

Which of the following statements, about the advantage of roasting of sulphide ore before reduction, is not trué? roasting of the sulphide to the oxide is thermodynamically feasible, carbon and hydrogen are suitable reducing agents for metal sulphides, The Delta_f G^o of the sulphide is greater than thóse for CS_2 and H_2 S , The Delta_f G^o is negative for roasting of sulphide ore to oxide.

Froth floatation process is convenient for the concentration of sulphide ores. Describe?

Assertion: If pure haematite is used as an ore for iron extraction, there is no need of roasting Reason: In the extraction of iron, final product in roasting is Fe_2O_3