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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
Give the importance of the following for living beings:
Nitrogen
Give the importance of the following for living beings:
Hydrogen
Why are alkali metals kept in kerosene oil?
brown powder deposit on iron?
Name:
(a) the processes involved in
concentration :-
Name:
(b) two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen
Explain the following term:
Gangue
Explain the following terms:
(c) slag
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?
Which metal is used for:
lithographic plates for printing
Which metal is used for:
making face creams
Name a metal which forms a liquid alloy at ordinary temperature.
Explain with reason:
Why is powdered coke sprinkled on top of the electrolyte?
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?
The chemical formula of zinc blend is _______.
Cassiterite is a copper ore.
Bassemerisation is used in the extraction of ______.
Which of following metals occurs in native state?
Name the process that is employed to refine aluminium.
