Main ore of lead is gaalena.This is mined and separated from other minerals by froth flotation.There are two methods of extracting the lead. (i)First method involves the roasting of ore followed by reduction with coke or CO. (ii)Second method involves the partial roasting of ore followed by self reduction. Which of the following statement is incorrect about the extraction of lead from galena ?

Main ore of lead is gaalena.This is mined and separated from other min

1.	Main ore of lead is gaalena.This is mined and separated from other minerals by froth flotation.There are two methods of extracting the lead. (i)First method involves the roasting of ore followed by reduction with coke or CO. (ii)Second method involves the partial roasting of ore followed by self reduction. Which of the following statement is incorrect about the extraction of lead from galena ?
Answer» Galena is a sulphide ore and therefore , it is concentrated by froth flotation process Self reduction takes place in absence of air COMPLETE ROASTING of galena gives PbO which is then reduced by coke or CO to GIVE metallic lead `FeSiO_3` is obtained as slag. Solution :`FeSiO_3` is obtained as slag in the extraction of copper from copper pyrites.