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प्रश्न
Explain the following term:
Metallurgy
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उत्तर
The process of extracting pure metals from their ores, followed by further purification using various processes. Metallurgy refers to the entire process.
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 ?
oxides
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
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is a more reactive metal.
Give the effect of heat on their: carbonates
Name:
(b) two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen
Explain the following terms:
smelting
An ore on being heated in air forms sulphurous anhydride. Write the process used for the concentration of this ore.
Where are the cathode and anode in the electrolytic cell? Name the material used for these?
state the reactions at the two electrodes ?
How is it removed?
What is magnalium? Name the main elements present in it? Write its one use ?
Arrange the metals in (2) in the decreasing order of reactivity.
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.
Explain with reason:
Why is powdered coke sprinkled on top of the electrolyte?
Draw a neat and labelled diagram for Froth Floatation Process.
Identify the following method of concentration of ores and explain briefly.
Complete the following flowchart.
Observe the figure and name and explain in brief the following method:
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).
In leaching of alumina from bauxite by Bayer's process, then ore is treated with ______.
