Extractive Metallurgy Interview Questions & Answers - 2

Question: 6

Most significant and important property of lead is its

(A) High resistance to corrosion

(B) High crystallization temperature

(C) Low melting point

(D) Shock absorbing capacity

Question: 7

Oxides of which of the following metals decompose by heat alone?

(A) Zn & Cr

(B) Pb & Fe

(C) Cu & Sn

(D) Ag & Hg

Question: 8

Electrolytic refining of aluminium is done by the _____ process.

(A) Bayer's

(B) Harris

(C) Hoope's

(D) Hall and Heroult

Question: 9

Which is the cheapest and the most common leaching chemical used in hydrometallurgical method of copper extraction from its oxide ores?

(A) Ammonium sulphate

(B) Brine

(C) Nitric acid

(D) Sulphuric acid

Question: 10

Main flux used in smelting of tin is

(A) Fluorspar

(B) Manganese ore

(C) Limestone

(D) Silica