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)
Which of the following statement is correct?
1. | Cast iron is obtained by remelting pig iron with scrap iron and coke using hot air blast. |
2. | In the extraction of silver, silver is extracted as a cationic complex. |
3. | Nickel is purified by zone refining. |
4. | Zr, and Ti are purified by the van Arkel method. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
From the following, the correct statements about the role of substances added in the froth flotation process are:
a. | Collectors enhance the non-wettability of the mineral particles. |
b. | Collectors enhance the wettability of gangue particles. |
c. | By using depressants in the process, two sulphide ores can be separated. |
d. | Froth stabilisers decrease the wettability of gangue. |
1. a and b
2. b and c
3. c and d
4. a and c
Which of the following statements are correct?
a. A depressant prevents certain types of particles to come to the froth.
b. Copper matte contains and .
c. The solidified copper obtained from the reverberatory furnace has a blistered appearance due to the evolution of during the extraction.
d. Zinc can be extracted by self-reduction.
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Match the items in Column I with the items in Column II and assign the correct code.
Column I | Column II |
A. Pendulum | 1. Chrome steel |
B. Malachite | 2. Nickel Steel |
C. Calamine | 3. Na3AlF6 |
D. Cryolite | 4. CuCO3. Cu (OH)2 |
5. ZnCO3 |
Codes
A | B | C | D | |
1. | 1 | 2 | 3 | 4 |
2. | 2 | 4 | 5 | 3 |
3. | 2 | 3 | 4 | 5 |
4. | 4 | 5 | 3 | 2 |
Match the items in Column I with the items in Column II and assign the correct code.
Column I | Column II |
A. Coloured Bands | 1. Zone refining |
B. Impure metal to volatile complex | 2. Fractional distillation |
C. Purification of Ge and Si | 3. Mond’s process |
D. Purification of mercury | 4. Chromatography |
5. Liquation |
Codes
A | B | C | D | |
1. | 1 | 2 | 3 | 4 |
2. | 4 | 3 | 1 | 2 |
3. | 3 | 4 | 2 | 1 |
4. | 5 | 4 | 3 | 2 |
Match the items in Column I with the items in Column II, and assign the correct code.
Column I | Column II |
A. Cyanide process | 1. Ultrapure Ge |
B. Froth flotation process | 2. Dressing of ZnS |
C. Electrolytic reduction | 3. Extraction of Al |
D. Zone refining | 4. Extraction of Au |
5. Purification of Ni |
Codes
A | B | C | D | |
1. | 4 | 2 | 3 | 1 |
2. | 2 | 3 | 1 | 5 |
3. | 1 | 2 | 3 | 4 |
4. | 3 | 4 | 5 | 1 |
Match the items of Column I with items of Column II and assign the correct code.
Column I |
Column II |
A. Sapphire |
1. Al2O3 |
B. Sphalerite |
2. NaCN |
C. Depressant |
3. Co |
D. Corundum |
4. ZnS |
5. Fe2O3 |
Codes
A B C D
1. 3 4 2 1
2. 5 4 3 2
3. 2 3 4 5
4. 1 2 3 4
Match the items of Column I with items of Column II and assign the correct code.
Column I | Column II | ||
A | Blistered Cu | 1. | Aluminium |
B | Blast furnace | 2. | 2Cu2O + Cu2S → 6Cu + SO2 |
C | Reverberatory furnace | 3. | Iron |
D | Hall-Heroult process | 4. | FeO + SiO2 → FeSiO3 |
5. | 2 Cu2S + 3O2 → 2Cu2O + 2SO2 |
Codes:
Options: | A | B | C | D |
1. | 2 | 3 | 4 | 1 |
2. | 1 | 2 | 3 | 5 |
3. | 5 | 4 | 3 | 2 |
4. | 4 | 5 | 3 | 2 |
Assertion (A): | Nickel can be purified by Mond’s process. |
Reason (R): | It is a volatile compound that decomposes at 460 K to give pure Ni. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | (A) is false but (R) is true. |