Advertisements
Advertisements
Question
Explain in brief types of extraction of highly reactive metals according to their reactivity.
Advertisements
Solution
Extraction of highly reactive metals:
- Highly reactive metals such as sodium, magnesium and calcium are obtained by electrolytic reduction.
- The metals are deposited at the cathode (negatively charged electrode), whereas chlorine gas is liberated at the anode (positively charged electrode).
E.g. For extraction of sodium metal, cathode and anode reactions are as follows:
At cathode: \[\ce{Na+ + e^- -> Na}\] (Reduction)
At anode: \[\ce{2Cl- -> Cl2 + 2e^-}\] (Oxidation)
APPEARS IN
RELATED QUESTIONS
Give a reasons for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
Name the following:
The property possessed by metals by which they can be beaten into sheets.
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Why does aluminium not corrode right through?
How is zinc extracted from its carbonate ore (calamine)? Explain with equations.
Which metal is extracted from bauxite ore?
The metal which can be extracted from the bauxite ore is ______.
Which of the following is an ore of mercury metal?
The metal which is always present in an amalgam is ______.
Which of the following metals are extracted by the electrolysis of their molten chlorides?
Give the principles of the froth floatation process.
Define the following term.
Mineral
Give the chemical formula of :
Sodium aluminate
Name the following:
The substance added to get rid of gangue in the extraction of metal.
Compare the process of calcination and roasting.
Which one of the following is not true of metal :
Metals are good conductors of electricity.
Name the following :
The Process of heating an ore to a high temperature in the presence of air.
Gold and silver are active metals.
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
In extraction of copper, the flux used is ____________.
