Advertisements
Advertisements
प्रश्न
The following is a sketch of an electrolytic cell used in the extraction of aluminium :
(a) What is the substance of which the electrode A and B are made?
(b) At which electrode (A or B) is aluminium formed?
(c) What are the two aluminium compounds in the electrolyte C?
(d) Why is it necessary for electrode B to be continuously replaced?
उत्तर
(i) A is made of carbon and B is a thick graphite rod.
A → Cathode
B → Anode
(ii) Aluminium is formed at electrode A.
(iii) The two aluminium compound in the electrolyte C is Na3AlF6, Al2O3.
(iv) It is necessary to continuously replace electrode B from time to time as it gets oxidized by the oxygen evolved.
APPEARS IN
संबंधित प्रश्न
brown powder deposit on iron?
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is a more reactive metal.
Give the effect of heat on their: nitrates
Name:
(a) the processes involved in
concentration :-
An ore on being heated in air forms sulphurous anhydride. Write the process used for the concentration of this ore.
`Ag2O`
................................
Which metal is used for:
making face creams
Explain concept with example/explain with the help of a balanced equation.
Gangue
Bassemerisation is used in the extraction of ______.
A process of extracting metals from aqueous solutions of their salts using suitable reducing agents is called ______
Calcination is used in metallurgy for the removal of?
