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प्रश्न
Sulphide ores : Roasting : : Carbonate ores : _______
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उत्तर
Sulphide ores : Roasting : : Carbonate ores : Calcination
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संबंधित प्रश्न
Which of the following pairs will give displacement reactions?
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Name one metal which is extracted by electrolytic reduction.
Name two metals which occur in nature in free state as well as in combined state.
Name the gas evolved when cinnabar ore is roasted.
Name two metals which are found in nature mainly in the free state (as metallic elements).
What is the difference between a mineral and an ore?
Name the metal which is extracted from haematite ore.
Which metal is extracted from bauxite ore?
The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite
Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?
(a) Al2O3 + Fe
(b) MnO2 + Al
(c) Fe2O3 + Al
(d) Cu2O + Fe
The metal which can be extracted simply by heating the cinnabar ore in air is:
(a) Zn
(b) Cu
(c) Al
(d) Hg
Give the principles of electromagnetic separation.
Give reasons, why aluminum is used in:
In aluminiothermy
Give the chemical formula of :
Cryolite
Define the term:
Flux
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
Explain Bayer’s process.
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
