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प्रश्न
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
उत्तर
A large block of impure metal (copper) is made the anode and a thin strip of pure metal (copper) is made the cathode. An acidified solution of copper sulphate (CuSO4) is taken as the electrolyte.
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संबंधित प्रश्न
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Name the electrode at which aluminium metal is produced.
The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its:
(a) oxide
(b) hydride
(c) sulphide
(d) carbonate
Calamine ore can be converted into zinc oxide by the process of:
(a) dehydration
(b) roasting
(c) calcination
(d) sulphonation
Which metal can be extracted from the following ore?
Haematite
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Why is powdered coke sprinkled on top of the electrolyte?
Aluminium oxide is _______ oxide.
Care must be taken while diluting concentrated nitric acid with water. Why?
Assertion (A): The extraction of metals from their sulphide ores cannot take place without roasting the ore.
Reason (R): Roasting converts sulphide ores directly into metals.
