Ores & Metallurgy

Silver obtained from argentiferrous lead containing lead impurity is purified by

Q: Silver obtained from argentiferrous lead containing lead impurity is purified by

(a) Distillation

(b) Froth floatation

(c) Cupellation

(d) Treatment of KCN

Ans: (c)

 

The slag obtained during the extraction of copper from copper pyrites is composed mainly of

Q: The slag obtained during the extraction of copper from copper pyrites is composed mainly of

(a) CaSiO3
                                                      
(b) FeSiO3

(c) CuSiO3 
                                                     
(d) SiO2

Ans: (b)

In the manufacture of iron lime stone added to the blast furnace, the calcium ion ends in the form of

Q: In the manufacture of iron lime stone added to the blast furnace, the calcium ion ends in the form of

(a) Slag

(b) Gangue

(c) Calcium metal

(d) CaCO3

Ans: (a)

The substance with is mixed with the ore for removal of impurities is termed as

Q: The substance with is mixed with the ore for removal of impurities is termed as

(a) Slag

(b) Gangue

(c) Flux

(d) Catalyst

Ans: (c)

Heating of pyrites in air for oxidation of sulphur is called.

Q: Heating of pyrites in air for oxidation of sulphur is called.

(a) Roasting

(b) Calcination

(c) Smelting

(d) Slagging

Ans: (a)