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10th ICSE
IMPORTANT
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Write the equation for the reaction where the aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide.

Important Questions on Metallurgy

MEDIUM
10th ICSE
IMPORTANT
All in One - ICSE Chemistry>Chapter 7 - Metallurgy>ARCHIVES*(Last 6 Years)>Q 13
Name the compound added to pure alumina to lower the fusion temperature during the electrolytic reduction of alumina.
HARD
10th ICSE
IMPORTANT
All in One - ICSE Chemistry>Chapter 7 - Metallurgy>ARCHIVES*(Last 6 Years)>Q 13
Write the equation for the reaction that occurs at the cathode during the extraction of aluminium by electrolysis.
HARD
10th ICSE
IMPORTANT
All in One - ICSE Chemistry>Chapter 7 - Metallurgy>ARCHIVES*(Last 6 Years)>Q 13
Explain, why it is preferable to use a number of graphite electrodes as anode instead of a single electrode, during the electrolysis of alumina?
HARD
10th ICSE
IMPORTANT
All in One - ICSE Chemistry>Chapter 7 - Metallurgy>ARCHIVES*(Last 6 Years)>Q 14
Describe the role of cryolite in the extraction of aluminium.
MEDIUM
10th ICSE
IMPORTANT
All in One - ICSE Chemistry>Chapter 7 - Metallurgy>ARCHIVES*(Last 6 Years)>Q 14
Describe the role of sodium hydroxide in the extraction of aluminium.
HARD
10th ICSE
IMPORTANT
All in One - ICSE Chemistry>Chapter 7 - Metallurgy>ARCHIVES*(Last 6 Years)>Q 14
Describe the role of graphite in the extraction of aluminium.
HARD
10th ICSE
IMPORTANT
All in One - ICSE Chemistry>Chapter 7 - Metallurgy>ARCHIVES*(Last 6 Years)>Q 14
In the electrolysis of alumina using the Hall-Heroult's process the electrolyte is covered with powdered coke. Explain why?
MEDIUM
10th ICSE
IMPORTANT
All in One - ICSE Chemistry>Chapter 7 - Metallurgy>ARCHIVES*(Last 6 Years)>Q 14
Iron sheets are coated with zinc during galvanisation. Explain why?