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प्रश्न
Complete the following flowchart.
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उत्तर
| Separation method of metals | |||
| Wilfley table method | Hydraulic separation method | Magnetic separation method | Froth floatation method |
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संबंधित प्रश्न
Give the importance of the following for living beings:
Hydrogen
brown powder deposit on iron?
Explain the following term:
Gangue
Explain the following terms:
(c) slag
`2NaNO_3`
......................
Give the ionization reactions of electrolyte used in Hall’s process. write the reaction at the cathode and the anode. Why the anode has to be replaced in this process?
what does it form with silica present in the ore?
Distinguish between electrolytic methods of reduction and refining.
Which metal is used for:
making pipes, buckets, water tanks,
Name a metal which forms a liquid alloy at ordinary temperature.
Complete the following flow chart and answer the questions below:
i) In which method pine oil is used?
ii) Explain what method of concentration in brief.
Explain with reason:
Why is powdered coke sprinkled on top of the electrolyte?
The following is a sketch of an electrolytic cell used in the extraction of aluminium :
(a) What is the substance of which the electrode A and B are made?
(b) At which electrode (A or B) is aluminium formed?
(c) What are the two aluminium compounds in the electrolyte C?
(d) Why is it necessary for electrode B to be continuously replaced?
Why does iron or zinc not occur free in nature?
In Wilfley table method to separate particles of gangue _______ method is used.
Identify the following method of concentration of ores and explain briefly.
State the reason for the addition of caustic alkali to bauxite ore during the purification of bauxite.
Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27°C? (R = 2 cal K-1 mol-1).
Explain the following term:
Metallurgy
Name the process that is employed to refine aluminium.
