Explain the role of the following:

(a) NaCN in the separation of ZnS and PbS.

(b) `SiO_2` in the metallurgyof Cu containing Fe as impurity.

(c) Iodine in the refining of Ti.

Explain the role of each of the following : (i) NaCN in the extraction of silver (ii) SiO_(2) in the extraction of copper

Explain the role of each of the following : (i) NaCN in the extraction of silver (ii) SiO_(2) in the extraction of copper

Describe the role of (i) NaCN in the extraction of gold from gold ore. (ii) SiO_(2) in the extraction of copper from copper matter. (iii) Iodine in the refining of zirconium. Write chemical equations for the involved reactions.

Describe the role of the following : (i) NaCN in the extraction of silver from a silver ore (ii) Iodine in the refining of titanium (iii) Cryolite in the metallurgy of aluminium

Explain the use of the following : (a) NaCN in Froth Floatation Method. (b) Carbon monoxide in Mond process. (c) Coke in the extraction of Zinc from Zinc Oxide

Which of the following reagents willnot be useful in separating a mixture of Zn^(2+) and Cu^(2-) ?

(a) Write the principle of vapour phase refining. (b) Write the role of dilute NaCN in the extraction of silver. (c) What is the role of collectors in the froth floatation process? Give an example of a collector.

Lead obtained form galena (PbS) by air reduction or carbon reduction process contains base metal (Cu, Bi, Sn, As) as impurities, due to the which lead becomes hard and brittle. Zn-Ag alloy formed in the upper layer of molten lead is skimmed off from the surface of the molten lead by perforated ladles. This alloy contains lead as impurity. This impurity of Pb is removed by

Which of the following statements is/are incorrect? (a) Cassiterite is not the ore of tin (b) Metallurgy is a process of mixing of ore (c) concentration of chromite ( FeO.Cr_2O_3 ) is done by magnetic separation (d) ZnS with depressant NaCN forms Na_2[Zn(CN)_4]

(a) Which of the following ores can be concentrated by froth floatation method and why? Fe_2O_3,ZnS,andAl_2O_3 (b) What is the role of silica in the metallurgy of Copper?