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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
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
A student has been collecting silver coins and copper coins. One day she observed a black
coating on silver coins and a green coating on copper coins. Which chemical phenomenon is
responsible for these coatings? Write the names of black and green coatings.
Name:
(b) two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen
`ZnCO_3`
..............................
`2AgNO_3`
...........................
`2Cu_2O +Cu_2S`
......................
`HgS + O_2`
..................
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?
Where are the cathode and anode in the electrolytic cell? Name the material used for these?
state the reactions at the two electrodes ?
Arrange the metals in (2) in the decreasing order of reactivity.
In Wilfley table method to separate particles of gangue _______ method is used.
The chemical formula of zinc blend is _______.
Write scientific reason.
Magnetic separation method is used to separate the magnetic ingredients in the ores.
Draw a neat and labelled diagram for Froth Floatation Process.
The chemical name of rust is ______.
State the reason for the addition of caustic alkali to bauxite ore during the purification of bauxite.
Zirconium is refined by ____________.
In leaching of alumina from bauxite by Bayer's process, then ore is treated with ______.
