Tag: production of metals
Questions Related to production of metals
In the upper layers of the earth, that is, in the crust, the most abundant metal is:
(a) Roasting and calcination are the two processes to reduce the metal oxides to the respective metals.
(b) Magnesium is extracted from its ore by electrolytic reduction process.
(c) Cryolite is used in metallurgy of aluminium in order to increase the fusibility and conductivity
(d) I Hall's process bauxite is leached with the help of ${Na} _{2}{CO} _{3}$.
Which of the following options regarding the above statements is correct?
State the function of fluorspar in the metallurgy of aluminium.
State the function of cryolite?
The electrolyte used in electrolytic refining of impure aluminium is __________.
In the electrolytic reduction of alumina, the electrolyte is covered with coke powder because, it __________.
A layer of coke is spread over bauxite during extraction of aluminium. This act as a/an
Aluminum is used for making cooking utensils. which of the following propertis of aluminium are responsible for the same ?
(i) Good thermal conductivity ctrical conductivity
(ii) Good electrical conductivity
(iii) Ductillity
(iv) High melting point
The mass of carbon anode consumed (giving of carbon dioxide) in the production of $270 \ kg$ aluminium metal bum bauxite by Hall process is: (Atomic mass $Al = 27$)
In case of Hall's process applied on reduction of $Al _2O _3$ to Al can be done by using: