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प्रश्न
Extraction of moderately reactive elements is done by _______ and _______ method.
पर्याय
roasting and calcination
roasting and reduction
separation and calcination
none of these
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उत्तर
Extraction of moderately reactive elements is done by roasting and calcination method.
संबंधित प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
Name two metals which are highly resistant to corrosion.
Name two metals which are always found in combined state.
Name the metal which is extracted from haematite ore.
Which metal is extracted from calamine ore?
Aluminum is used in thermite welding:
write reaction for process?
How an ore is concentrated by froth floatation process?
Which method of refining is used to get 99.8% pure aluminium?
Usually ______ ores are subjected to ______ which is done in the absence of air.
What is the difference between calcination and roasting?
How is the method of extraction of metals high up in the reactivity series different from that for metals in the middle? Why can the same process not be applied for them? Name the process used for the extraction of these metals.
In electrolytic reduction of alumina _______ is used as a cathode.
_______ is the least reactive metal.
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
Right or wrong sentence?
The electrolysis of alumina combines fluorite and cryolite to increase the solubility in the precipitation method.
Write the molecular formulae of the following compound.
Fluorspar
Explain the reactions of nonmetals with water with the help of examples.
Explain in brief types of extraction of moderately reactive metals according to their reactivity.
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
