Bauxite has the composition ______.

(a)

Al₂O₃

(b)

Al₂O₃.nH₂O

(c)

Fe₂O₃.2H₂O

(d)

None of these

Electrochemical process is used to extract_______.

(a)

Iron

(b)

Lead

(c)

Sodium

(d)

silver

Zinc is obtained from ZnO by________.

(a)

Carbon reduction

(b)

Reduction using silver

(c)

Electrochemical process

(d)

Acid leaching

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

(a)

Fe

(b)

Cu

(c)

Mg

(d)

Zn

Which of the following is used for concentrating ore in metallurgy?

(a)

Leaching

(b)

Roasting

(c)

Froth floatation

(d)

Both (a) and (c)

Copper pyrite

(1)

Zn

Azurite

(2)

Diaspore

Calamine

(3)

2CuCO₃.Cu(OH)₂

Chemical method

(4)

CuFeS₂

Oxide ore

(5)

Bauxite

What are the differences between minerals and ores?

What is the role of quick lime in the extraction of Iron from its oxide Fe₂O₃?

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

Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

What is meant by concentration?

Explain zone refining process with an example.

Give the uses of zinc.

Explain the electrometallurgy of aluminium.

Explain the following terms with suitable examples.
(i) Gangue
(ii) slag

Mention the uses of copper.

Explain the principle of electrolytic refining with an example.

Give the limitations of Ellingham diagram.

Write a short note on electrochemical principles of metallurgy.

Explain froth flotation, with diagram.

List out the application of aluminum.