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प्रश्न
Explain the following term:
Gangue
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उत्तर
Ores are composed of metal compounds and impurities such as soil, sand, and stony material. These contaminants are known as gangue.
संबंधित प्रश्न
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.
Give the effect of heat on their: hydroxide
Name:
(b) two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen
What do you observe when hydrogen is passed over heated copper oxide?
`Ag2O`
................................
`ZnCO_3`
..............................
`2NaNO_3`
......................
`2AgNO_3`
...........................
Where are the cathode and anode in the electrolytic cell? Name the material used for these?
state the reactions at the two electrodes ?
Aluminium is extracted from its chief ore, bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction.
Write three balanced equations for the purification of bauxite.
What do you observe when hydrogen is passed over heated copper oxide?
The chemical formula of zinc blend is _______.
Match the columns.
| Group A | Group B |
| 1. ZnS | a) Copper Sulphide |
| 2. HgS | b) Bauxite |
| c) Cinnabar | |
| d) Zinc blend |
Write the molecular formulae of the following compound.
Stannic oxide
Identify the following method of concentration of ores and explain briefly.
Limestone is used as a flux in the extraction of ______.
Which of following metals occurs in native state?
A process of extracting metals from aqueous solutions of their salts using suitable reducing agents is called ______
Identify false statement regarding lithium aluminium hydride?
