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Write the composition of bauxite.

Important Questions on Metallurgy

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Science>Chemistry>Metallurgy>Extraction of Aluminium

Molten cryolite is mixed with molten alumina in the extraction of aluminium by electrolysis. Why? Name the substances that are used as anode and cathode in this method. 

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Science>Chemistry>Metallurgy>Extraction of Aluminium
Which material is used to bring melting point lower in electrochemical reduction to obtain aluminium from alumina?
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Science>Chemistry>Metallurgy>Extraction of Aluminium
Explain with neat diagram the extraction of aluminium from molten alumina.
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Science>Chemistry>Metallurgy>Extraction of Aluminium
Write the names and main ores of aluminium. Describe the process for obtaining pure aluminium from one of these ores giving chemical reactions.
EASY
Science>Chemistry>Metallurgy>Extraction of Aluminium
Describe the role of the following: Cryolite in the extraction of aluminium from pure alumina.
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Science>Chemistry>Metallurgy>Extraction of Aluminium
Explain the process of extraction of Aluminium. Give a labelled diagram and also give chemical equations for the reactions taking place.
HARD
Science>Chemistry>Metallurgy>Extraction of Aluminium
Explain the electrochemical reduction method to obtain aluminium from alumina with diagram.
HARD
Science>Chemistry>Metallurgy>Extraction of Aluminium

Explain the electrolytic reduction of Alumina by Hall’s process with the help of a labelled diagram.

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Science>Chemistry>Metallurgy>Extraction of Aluminium
Name one important ore of aluminium. Give its chemical composition.
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Science>Chemistry>Metallurgy>Extraction of Aluminium

Draw the given diagram and label the parts.

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Science>Chemistry>Metallurgy>Extraction of Aluminium
Draw a neat labelled diagram of an electrolytic cell used for the extraction of aluminium.
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Science>Chemistry>Metallurgy>Extraction of Aluminium
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of Al2O3 with cryolite.
Reason (R) : The oxidation state of Al in cryolite is +3.
In the light of the above statements, choose the most appropriate answer from the options given below :
EASY
Science>Chemistry>Metallurgy>Extraction of Aluminium
Which of the following is the formula for bauxite, ore of aluminium?
HARD
Science>Chemistry>Metallurgy>Extraction of Aluminium
Write the concentration of Bauxite ore by Hall's process with equation.
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Science>Chemistry>Metallurgy>Extraction of Aluminium
Write the chemical formula of cryolite? Why is it added to bauxite in the extraction of aluminium? 
MEDIUM
Science>Chemistry>Metallurgy>Extraction of Aluminium
What are present along with pure alumina in the molten mixture which is electrolysed for the extraction of aluminium by electrolysis? What is used as cathode and anode in this electrolysis?
HARD
Science>Chemistry>Metallurgy>Extraction of Aluminium
What is the role of cryolite in the metallurgy of aluminium?
HARD
Science>Chemistry>Metallurgy>Extraction of Aluminium
Explain the Hall-Heroult method to obtain the aluminium from alumina with a diagram.
EASY
Science>Chemistry>Metallurgy>Extraction of Aluminium
What is the role of cryolite in the metallurgy of aluminium?
EASY
Science>Chemistry>Metallurgy>Extraction of Aluminium
In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?