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प्रश्न
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
पर्याय
Right
Wrong
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उत्तर
In the electrolytic method, a layer of highly active metal is applied to a less active metal- Wrong
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संबंधित प्रश्न
Name the following:
Main ore of aluminium.
In the extraction of aluminium: Name the process of concentration of bauxite.
Name one metal which is extracted by reduction with aluminium.
Which metal is extracted from calamine ore?
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
An ore of manganese metal is:
(a) bauxite
(b) haematite
(c) cuprite
(d) pyrolusite
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
Rock salt is an ore of one of the following metals. This metal is:
(a) Mn
(b) Na
(c) Fe
(d) Cu
Define the term:
Flux
Explain the following:
Galvanization protects iron from rusting.
The following questions relate to the extraction of aluminium by electrolysis.
Explain why it is necessary to renew the anode periodically.
Which one of the following is not true of metal :
Metals are good conductors of electricity.
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
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 in brief electrolytic reduction of alumina with a neat labelled diagram.
Which of the following ore is concentrated by the Froth floatation process?
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 the reason why the above reaction is known as a thermite reaction.
A mineral from which the metal can be extracted economically and conveniently is known as ______.
