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प्रश्न
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
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उत्तर
In Electrolytic reduction of alumina, Anode : Set of carbon (graphite) rods : : Cathode : Graphite lining
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संबंधित प्रश्न
Give a reason for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
Explain given equation, what happens when ZnCO3 is heated in the absence of air?
Give the name of one ore of iron. Which iron compound is present in this ore? Write its chemical formula.
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
Calamine ore can be used to extract one of the following metals. This metal is:
(a) copper
(b) mercury
(c) aluminium
(d) zinc
Rock salt is an ore of one of the following metals. This metal is:
(a) Mn
(b) Na
(c) Fe
(d) Cu
Which metal can be extracted from the following ore?
Haematite
State three objectives achieved during the roasting of ores.
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
Name the following:
Two metals which are found in the free or native state.
Compare the process of calcination and roasting.
Explain the following:
Galvanization protects iron from rusting.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
How many valence electrons are present in metals ?
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
Which one of the following is not true of metal :
Metals are malleable and ductile
In the electrolytic reduction of alumina, the lining of graphite acts as an anode.
Explain in brief types of extraction of moderately reactive metals according to their reactivity.
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
In thermite welding a mixture of ____________ is ignited with a burning magnesium ribbon which produces molten iron metal as a large amount of heat is evolved.
