Question

For the extraction of Pb when impurity content is very high, then during roasting of galena, the formation of which compound (*) is/are prevented by lime –

(a) PbSO4

(b) PbSiO3

(c) Both (a) and (b)

(d) CaSiO3

Answer 1

Correct option: (c) Both (a) and (b)

Explanation:

By intermittently filled lime the blown air in the sinterer gets diffused and PbS particles come under limited supply of air therefore formation of PbSO4 is prevented.