Bauxite has the composition ______.

(a)

Al₂O₃

(b)

Al₂O₃.nH₂O

(c)

Fe₂O₃.2H₂O

(d)

None of these

Wolframite ore is separated from tinstone by the process of________.

(a)

Smelting

(b)

Calcination

(c)

Roasting

(d)

Electromagnetic separation

Electrochemical process is used to extract_______.

(a)

Iron

(b)

Lead

(c)

Sodium

(d)

silver

Flux is a substance which is used to convert_______.

(a)

Mineral into silicate

(b)

Infusible impurities to soluble impurities

(c)

Soluble impurities to infusible impurities

(d)

All of these

Considering Ellingham diagram, which of the following metals can be used to reduce alumina? 

(a)

Fe

(b)

Cu

(c)

Mg

(d)

Zn

What are the differences between minerals and ores?

Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.

Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?

Why should we have a ecofriendly metallurgical process?

Can the same method of extraction be used for all metals.

Explain zone refining process with an example.

Give the uses of zinc.

Give the basic requirement for vapour phase refining.

What is meant by ammonia leaching?

Before reduction, the ore is first converted into the oxide of metal of interest. Give reason

The selection of reducing agent depends on the thermodynamic factor: Explain with an example.

Give the limitations of Ellingham diagram.

In the extraction of copper, explain the smelting process.

Explain refining of nickel by mond's process