2. Given the following assertion 'A'. and the reason 'R' the correct option is
Assertion A: In Bayer's process, high pressure is used to dissolve alumina from bauxite.
Reason R: Pressure increases the boiling point of water.
Assertion A: In Bayer's process, high pressure is used to dissolve alumina from bauxite.
Reason R: Pressure increases the boiling point of water.
3. Characteristics of Zinc meta
4. Match the type of reagent used in floatation in Group 1 with reagent in Group 2.
Group 1
Group 2
P. Collector
1. Pine oil
Q. Regulator
2. Copper sulphate
R. Activator
3. Sodium ethyl xanthate
S. Frother
4. Lime
Group 1 | Group 2 |
P. Collector | 1. Pine oil |
Q. Regulator | 2. Copper sulphate |
R. Activator | 3. Sodium ethyl xanthate |
S. Frother | 4. Lime |
5. The process of cementation involves
6. The following metals such as Mg, Al and Na is used to extract from
7. A conventional (Pierce-Smith) copoer converter is
8. Who has practically demonstrated the electrolysis of sodium hydroxide
9. Match the processes given in Group I with the corresponding metals in Group 2.
Group 1
Group 2
P. Matte smelting
1. Lead
Q. Cyanide leaching
2. Copper
R. Carbothermic reduction
3. Gold
S. Fused salt electrolysis
4. Aluminium
Group 1 | Group 2 |
P. Matte smelting | 1. Lead |
Q. Cyanide leaching | 2. Copper |
R. Carbothermic reduction | 3. Gold |
S. Fused salt electrolysis | 4. Aluminium |
10. Match the unit processes in Group 1 with the objectives in Group 2.
Group 1
Group 2
P. Leaching
1. Precipitation of metal in aqueous solution
Q. Cementation
2. Selective dissolution of metal
R. Roasting
3. Conversion of mattee to metal
S. Converting
4. Conversion of sulfide to oxide
5. Separation of metal from slag
Group 1 | Group 2 |
P. Leaching | 1. Precipitation of metal in aqueous solution |
Q. Cementation | 2. Selective dissolution of metal |
R. Roasting | 3. Conversion of mattee to metal |
S. Converting | 4. Conversion of sulfide to oxide |
5. Separation of metal from slag |