Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?
1. Distillation
2. Zone refining
3. Electrolysis
4. Chromatography
The correct statement among the following is:
1. | Blister copper has a blistered appearance due to the evolution of CO2. |
2. | Vapour phase refining is carried out for nickel by the Van Arkel method. |
3. | Pig iron can be moulded into a variety of shapes. |
4. | Wrought iron is impure iron with 4 % carbon. |
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 |
Options: | (a) | (b) | (c) | (d) |
1. | (iv) | (iii) | (i) | (ii) |
2. | (iv) | (iii) | (ii) | (i) |
3. | (ii) | (i) | (iv) | (iii) |
4. | (iii) | (iv) | (i) | (ii) |