Advertisements
Advertisements
Question
Right or wrong sentence?
The electrolysis of alumina combines fluorite and cryolite to increase the solubility in the precipitation method.
Options
Right
Wrong
Advertisements
Solution
The given sentence is wrong.
Explanation:
Cryolite and fluorspar are added to alumina to lower its extremely high melting point and increase its electrical conductivity. They are not used to increase solubility, and the process is electrolytic reduction, not precipitation.
APPEARS IN
RELATED QUESTIONS
What chemical process is used for obtaining a metal from its oxide?
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
Give one word or a phrase:
The process by which sulphide ore is concentrated.
Why do gold ornaments look new even after several years of use?
Define the term gangue.
Explain why, an aqueous solution of sodium chloride is not used for the electrolytic extraction of sodium metal.
Name the gas produced when calamine ore is calcined.
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
The metal which can be extracted simply by heating the cinnabar ore in air is ______.
Which of the following metals are extracted by the electrolysis of their molten chlorides?
Which one of the following is not true of metal :
Metals form non-polar covalent compounds
What is the difference between calcination and roasting?
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
Write the name.
The molecular formula of main ore of aluminium -
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
Explain concept with example/explain with the help of a balanced equation.
Roasting
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
In thermite welding a mixture of ____________ is ignited with a burning magnesium ribbon which produces molten iron metal as a large amount of heat is evolved.
