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
Explain why, carbon cannot reduce oxides of sodium or magnesium.
Define the term gangue.
The metal which can be extracted from the bauxite ore is ______.
Which of the following metals are extracted by the electrolysis of their molten chlorides?
State why aluminium is extracted from its oxide by electrolysis while copper, lead, iron by reducing agents and mercury and silver by thermal decomposition.
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
Name a non- metal that has a metallic luster and sublimes on heating.
Name the following:
The process of heating an ore to a high temperature in the presence of air.
Answer the following question :
What is the difference between calcination and roasting.
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
Complete the following by selecting the correct option from the choices given:
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is _________
In electrolytic reduction of alumina _______ is used as a cathode.
Atomic number of aluminium is _______ and its electronic configuration is _______.
Extraction of moderately reactive elements is done by _______ and _______ method.
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
Identify who I am!
Ore of Aluminum- ______
Explain the concept of Calcination.
Explain Bayer’s process.
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
