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प्रश्न
In the electrolytic reduction of alumina, the lining of graphite acts as an anode.
पर्याय
Right
Wrong
उत्तर
In the electrolytic reduction of alumina, the lining of graphite acts as an anode- Wrong
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संबंधित प्रश्न
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example.
Explain givem equation, what happens when a mixture of Cu2O and Cu2S is heated?
Which of the following pair of metals exists in their native state in nature?
(a) Ag and Hg
(b) Ag and Zn
(c) Au and Hg
(d) Au and Ag
A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
(a) Name the metal and write its chemical symbol.
(b) Write the name and formula of the sulphide ore.
(c) Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
(d) Name a common device in which this metal is used.
(e) Can this metal displace copper from copper sulphate solution? Why?
Which metal can be extracted from the following ore?
Calamine
Give reasons, why aluminum is used in:
In aluminiothermy
Define the term : Flux
Compare the process of calcination and roasting.
Answer the following question :
What is the difference between calcination and roasting.
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 ______.
Define roasting.
Name the process used for the enrichment of sulphide ore.
Aluminium oxide is _______ oxide.
Write the molecular formulae of the following compound.
Sodium aluminate
Explain the characteristics of ionic compounds.
Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give a reason why Aluminium is preferably used in thermite reactions.
A mineral from which the metal can be extracted economically and conveniently is known as ______.
