Metallurgy: Concentration, roasting, smelting, refining of ores, metallurgy of copper and iron, corrosion of metals, alloys

What does rust at the surface of iron consist of?

Which of the following alloy contains silver ?

Give the chemical (molecular) formula for copper pyrites.

Match the following :
(a) Calcination — (i) Presence of air
(b) Roasting — (ii) Pine oil
(c) Smelting — (iii) Absence of air
(d) Frothing Agent — (iv) Reduction of metal oxide

The oxides of iron ore are reduced in the blast furnace at lower temperature range 500 – 800 K. This reduction is due to

German silver is an alloy of copper and which of the following metals?

During the extraction of copper from cuprous oxide, blisters appeared on the surface of solidified copper is due to

Which is the purest form of commercial iron?

In galvanisation the surface of iron is covered by following metal

Which of the following is a slag ?

Which alloy steel is used for the preparation of permanent magnets ?

Brass is an alloy of which of the following metals?

Which of the following method is used for extraction or refining of metals ?

Ores that are concentrated by Froth Flotation method are :

Which among the following alloys contains Tin(Sn) as one of its constituents ?