Long Answer TypeWrite down the reactions taking place in different Zones in the blast furnance during the extraction of Iron.
Short Answer TypeHow can you separate alumina from silica in a baxuite ore associated with silica? Give equations, if any.
Giving examples differentiate between 'roasting' and 'calcium'.
|
Roasting |
Calcination |
|
1. It is a process of heating the ore in presence of excess of air. |
1. It is a process of heating strongly in the absence of air. |
|
2. It is used to convert the sulphides ore into oxide ore. 2ZnS(s) + 3O2(g) →2ZnO(s) + 2SO2 (g) |
2. It is used to convert the carbonate or hydrated oxide ores to oxide ore. ZnCO3 (s) →ZnO(s) + CO2 (g) |
Long Answer TypeName the processes from which chlorine is obtained as a bye-product. What will happen if an aqueous solution of NaCl is subjected to electrolysis?
Outline the principles of refining of metals by the following methods:
(i) Zone refining.
(ii) Electrolytic refining.
(iii) Vapour phase refining.
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