Advertisements
Advertisements
प्रश्न
Observe the figure and name and explain in brief the following method:
उत्तर
The method shown in the figure is the magnetic separation method.
- The magnetic separation process is based on the differences in magnetic properties of the ore components.
- This method requires an electromagnetic machine which consists of a nonmagnetic conveyor belt moving over two rollers, one of which is magnetic in nature while the other is nonmagnetic.
- The powdered ore is dropped over the moving belt near the nonmagnetic roller. Two collector vessels are placed below the magnetic roller.
- The nonmagnetic particles are carried further along with the belt and fall in the collector's vessel placed away from the magnetic roller. At the same time, the magnetic portion of the ore is attracted by the magnetic roller and falls in the collector vessel near the magnetic roller.
APPEARS IN
संबंधित प्रश्न
brown powder deposit on iron?
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.
Identify A and B and give their reactions with dil HCL and dil H2SO4 ?
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:
(a) the processes involved in
concentration :-
Name:
(b) two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen
`ZnCO_3`
..............................
`2NaNO_3`
......................
`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?
what does it form with silica present in the ore?
State two properties of brass that render it more useful for some purpose than its components.
Name a metal which forms a liquid alloy at ordinary temperature.
Name the following:
Name an allotrope of a non-metal that allows electricity to pass through it.
Why does iron or zinc not occur free in nature?
Complete flow chart given below.
Identify the following method of concentration of ores and explain briefly.
Explain the froth floatation method with a neat labelled diagram.
Explain the smelting process.
Explain the following term:
Metallurgy
