Q. No.| List-I | List-II | ||
| (I) | Calamine | (a) | ZnS |
| (II) | Sphalerite | (b) | \(ZnCO_3 \) |
| (III) | Galena | (c) | PbS |
| (IV) | Siderite | (d) | \(FeCO_3 \) |
| Options: | (I) | (II) | (III) | (IV) |
| 1. | a | b | c | d |
| 2. | b | a | c | d |
| 3. | b | a | d | c |
| 4. | d | c | b | a |
| Statement I: | In the electro-refining of blister copper precious metals are obtained in anode mud. |
| Statement II: | Pure copper is obtained by the above method |
| 1. | Both Statement I and Statement II are true. |
| 2. | Both Statement I and Statement II are false. |
| 3. | Statement I is True while Statement II is false. |
| 4. | Statement I is False while Statement II is true. |
In the above reaction, \(FeO \) and \(FeSiO_3 \) act as a/an respectively:
1. Flux, Slag
2. Slag, Flux
3. Gangue, Slag
4. Slag, Flux
Al2O3 was leached with alkali to get X. The solution of X on the passing of gas Y forms Z. X, Y and Z respectively are:
| 1. | X = Na[Al(OH)4] , Y=SO2 , Z=Al2O3 |
| 2. | X = Na[Al(OH)4] , Y=CO2 , Z=Al2O3. xH2O |
| 3. | X = Al(OH)3 , Y=CO2, Z= Al2O3 |
| 4. | X = Al(OH)3, Y=SO2 , Z=Al2O3. xH2O |
The method used for the purification of Indium is-
1. Van Arkel method
2. Liquation
3. Zone refining
4. Vapour phase refining
Match List-I with List-II.
| List-I | List-II |
|
(a) Siderite (b) Calamine (c) Malachite (d) Cryolite |
(i) Cu (ii) Ca (iii) Fe (iv) Al (v) Zn |
Choose the correct answer from the options given below :
1. (a) (iii), (b) (i), (c) (v), (d) (ii)
2. (a) (i), (b) (ii), (c) (v), (d) (iii)
3. (a) (iii), (b) (v), (c) (i), (d) (iv)
4. (a) (i), (b) (ii), (c) (iii), (d) (iv)
Cast iron is used for the manufacture of :
1. Wrought iron and pig iron
2. Wrought iron and steel
3. Wrought iron, pig iron and steel
4. Pig iron, scrap iron and steel
Among statements (I) – (IV), the correct ones are-
| (I) | Limestone is decomposed to CaO during the extraction of iron from its oxides |
| (II) | In the extraction of silver, silver is extracted as an anionic complex |
| (III) | Nickel is purified by Mond's process |
| (IV) | Zr and Ti are purified by the Van Arkel method |
1. (III) and (IV) only
2. (I), (III), and (IV) only
3. (II), (III), and (IV) only
4. (I), (II), (III), and (IV)
An Ellingham diagram provides information about:
| 1. | The pressure dependence of the standard electrode potentials of reduction reactions involved in the extraction of metals. |
| 2. | The kinetics of the reduction process. |
| 3. | The temperature dependence of the standard Gibbs energies of formation of some metal oxides. |
| 4. | The conditions of pH and potential under which a species is thermodynamically stable. |
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