Advertisements
Advertisements
Question
In the extraction of Al, impure Al2O3 is dissolved in conc. NaOH to form sodium aluminate and leaving impurities behind. What is the name of this process?
Solution
In the extraction of aluminium, impure Al2O3 is dissolved in concentrated NaOH to form NaAlO2. This method is known as leaching of alumina.
Al2O3(s) + 2 NaOH(aq) + 3 H2O(l) → 2 Na[Al(OH)4](aq)
APPEARS IN
RELATED QUESTIONS
Out of C and CO, which is a better reducing agent at the lower temperature range in the blast furnace to extract iron from the oxide ore?
Fe2O3 is reduced to spongy iron near the top of blast furance by
(A) H2
(B) CaO
(C) SiO2
(D) CO
Draw neat and labelled diagram of Bessermer converter used in the extraction of copper.
What is the role of CO in the extraction of Iron?
Which form of the iron is the purest form of commercial iron?
Explain the following methods to protect metals from corrosion:
Galvanization
Complete the following statement by selecting the correct alternative from the choices given:
A current liberates 0.50 g of hydrogen in 2 hours. The weight of copper (at. wt. = 63.5) deposited at the same time by the same current through copper sulphate solution is: ___________
When copper ore is mixed with silica, in a reverberatory furnace copper matte is produced. The copper matte contains ______.
The important ore of iron is:-
When compared to ΔG° for the formation of Al2O3 ΔG° for the formation of Cr2O3 is
