The iron ore that is used to line the reverberatory furnace to prepare the purest form of iron is-

1. Haematite 

2. FeO

3. \(Fe_{3}O_{4}\)

4. None of the above.

Two sulphide ores are separated by : 

1. Hydrometallurgy method

2. Pyrometallurgy method

3. Froth floatation method

4. Gravimetric method

At a temperature above 1073 K, coke can be used to reduce FeO to Fe. It can be best explained by:

1. Ellingham diagram.

2. Orgel diagram.

3. Tunabo-Sugano diagram.

4. Born-Haber cycle.

Match the elements in Column I with methods of purification in Column II.

     Column I       Column II

(a) Boron             (i) Van Arkel method

(b) Tin                 (ii) Mond's process

(c) Zirconium       (iii) Liquation

(d) Nickel            (iv) Zone refining

(1) (a)-(iv) (b)-(iii) (c)-(i) (d)-(ii)

(2) (a)-(iv) (b)-(iii) (c)-(ii) (d)-(i)

(3) (a)-(ii) (b)-(i) (c)-(iv) (d)-(iii)

(4) (a)-(iii) (b)-(iv) (c)-(i) (d)-(ii)

During the process of electrolytic refining of copper, metals that are present as impurities and settle as anode mud are :

1. Ag, and Au

2. Pb, and Zn 

3. Fe, and Ni 

4. Sn, and Ag

Match the following choosing one item from column X and the appropriate item from column Y

1. 1-q, 2-s,3-r, 4p

2. 1-q, 2-r,3-s, 4p

3. 1-p, 2-r,3-s, 4q

4.1-r, 2-q,3-s, 4p

Match the extraction processes listed in column I with metals listed in column II.

A.  (1-p,r) (2-p) (3-q) (4-s)

B.  (2-p,r) (1-p) (3-q) (4-r)

C.  (1-q,r) (2-p) (4-q) (3-s)

D.  (1-p) (2-p,r) (3-q) (4-q)

A metal's oxide that can be reduced by Fe as a reducing agent at a temperature $T_1$ is:

1. Zr

2. Ca

3. Mg

4. None of the above.

Iron is extracted from chalcopyrite as :

1. FeO
2. FeS
3. Fe₂O₃
4. FeSiO₃

Extraction of metal from the ore cassiterite involves

(1) Carbon reduction of an oxide ore

(2) Self-reduction of a sulphide ore

(3) Removal of copper impurity

(4) Removal of iron impurity