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प्रश्न
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
उत्तर
In Electrolytic reduction of alumina, Anode : Set of carbon (graphite) rods : : Cathode : Graphite lining
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संबंधित प्रश्न
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Name the gas in air which tarnishes silver articles slowly.
Define the term mineral.
The metal which can be extracted from the bauxite ore is:
(a) Na
(b) Mn
(c) Al
(d) Hg
The metal which is always present in an amalgam is:
(a) iron
(b) aluminium
(c) mercury
(d) magnesium
Which metal can be extracted from the following ore?
Haematite
Give the principles of the hydrolytic method.
Define the following term.
Mineral
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Why is powdered coke sprinkled on top of the electrolyte?
Name the ore of mercury. With the help of balanced chemical equations, explain the process of extraction of mercury from its ore.
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
Name the methods by which concentrated ore is converted to metallic oxide.
What is the difference between calcination and roasting?
Find the odd one out and give its explanation.
Explain the following reaction with the balanced equation.
Zinc sulphide is heated strongly in excess of air
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
An alloy is
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
