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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
Why are alkali metals kept in kerosene oil?
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 ?
oxides
Explain the following terms:
smelting
`Ag2O`
................................
`ZnCO_3`
..............................
`2NaNO_3`
......................
state the reactions at the two electrodes ?
Which metal is used for:
making pipes, buckets, water tanks,
Which metal is used for:
lithographic plates for printing
Which metal is used for:
making face creams
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.
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?
A compound that is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
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?
Right or wrong sentence.
Cassiterite is a copper metal.
Explain concept with example/explain with the help of a balanced equation.
Gangue
Explain the hydraulic separation method with a neat labelled diagram.
In leaching of alumina from bauxite by Bayer's process, then ore is treated with ______.
