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Which is/are correct statemet(s)?
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The basic principle of hydraulic washing is the difference in gravity of the particles of the gangue and the ore. So, it is a special type of gravity separation. An upward stream of running water is used to wash the powdered ore. The lighter gangue particles are cleared leaving the heavier ore particles. Hydraulic washing is used for cassiterite, chromite and pitchblende.
The Bayer process is the principal industrial method of refining bauxite to produce alumina (aluminum oxide).
Roasting is a process of heating of sulphide ore to a high temperature at higher concentration of air. This process is usually applied to sulfide minerals. During roasting, the sulfide is converted to an oxide, and then the sulfur is released as sulfur dioxide gas.
So the correct options are A, B and D
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| Question Text | Which is/are correct statemet(s)? |
| Answer Type | Text solution:1 |
| Upvotes | 150 |
