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प्रश्न
Write the name.
The process of strong heating of carbonate ores in insufficient air–
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उत्तर
The process of strong heating of carbonate ores in insufficient air– Calcination
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संबंधित प्रश्न
Name two metals which are found in nature in the free state.
Name the following:
The property possessed by metals by which they can be beaten into sheets.
Name the most abundant metal in the earth's crust.
Name the method by which aluminium metal is extracted.
Define the term mineral.
Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process?
Name two metals which are found in nature mainly in the free state (as metallic elements).
The metal which can be extracted from the bauxite ore is:
(a) Na
(b) Mn
(c) Al
(d) Hg
In an electrolytic tank, aluminium metal is being extracted by the electrolysis of molten aluminium oxide using carbon electrodes. It is observed that one of the carbon electrodes is gradually burnt away and has to be replaced.
(a) Which carbon electrode (cathode or anode) is burnt away?
(b) Why is this carbon electrode burnt away?
Give reasons, why aluminum is used in:
wrapping chocolates
Which one of the following is not true of metal :
Metals are malleable and ductile
Answer the following question :
What is the difference between calcination and roasting.
Define 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.
Sulphide ores : Roasting : : Carbonate ores : _______
In the electrolytic reduction of alumina, the lining of graphite acts as an anode.
Write the molecular formulae of the following compound.
Fluorspar
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
