Which one of the following ores is best concentrated by froth flotation method?
Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)
| Ore | Element |
| Chalcopyrite | Cu |
| Limestone | Ca |
| Corundum | Al |
| Magnetite | Fe |
| Pyrolusite | Mn |
| Cassiterite | Sn |
| Cinnabar | Hg |
| Calamine | Ca |
| Siderite | Zn |
| Cerussite | Ce |
How many of the following metals can be extracted by auto-reduction?
.
There are many minerals of zinc present in nature and some of this are - Zinc blende, willemite, franklinite, zincite and calamine . One of these minerals of zinc contains metal, nonmetal and metalloid elements in its chemical formula. The total number of atoms present per molecule in this mineral is_____.
The total number of oxide minerals of iron in the following are -
Haematite, iron pyrites, siderite, magnetite, limonite
How many of the following are methods to concentrate ores?
Gravity separation, magnetic separation, chromatography, froth floatation process, polling
How many of the following are methods used for the purification of crude metals?
Distillation, zone refining, roasting, electrolytic refining, liquation
How many number of metals from the following which are refined by Van Arkel method?
Calcination can be employed for the how many of the following ores?
- Limonite, siderite, zincite, zinc blende, calamine, cryolite, wolframite, cassiterite.
