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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
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.
Explain the following terms:
smelting
`2NaNO_3`
......................
`2Pb(NO3)_2`
.........................
`2AgNO_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?
Why is flux used in the blast furnace?
Which metal is used for:
lithographic plates for printing
Arrange the metals in (2) in the decreasing order of reactivity.
Name the following:
Name an allotrope of a non-metal that allows electricity to pass through it.
Write scientific reason.
Magnetic separation method is used to separate the magnetic ingredients in the ores.
Write the molecular formulae of the following compound.
Stannic oxide
Explain concept with example/explain with the help of a balanced equation.
Gangue
Explain the hydraulic separation method with a neat labelled diagram.
Identify the following method of concentration of ores and explain briefly.
The chemical name of rust is ______.
State the reason for the addition of caustic alkali to bauxite ore during the purification of bauxite.
Explain the following term:
Metallurgy
