Same chapter3 marksDifficulty: Medium
Name the constituents and one use of brass, bronze and duralumin.
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1 markDifficulty: Medium
Cryolite is added to alumina in the electrolytic extraction of aluminium in order to:
- araise the melting point
- blower the melting point and increase conductivity
- cact as a reducing agent
- dremove the gangue
Original Khojo Papers practice question — not from a past board paper.
Answer
lower the melting point and increase conductivity
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Pure alumina melts at about 2050 °C, which would make the process impossibly expensive.
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