- Chemical Engineering Basics - Section 1
- Chemical Engineering Basics - Section 2
- Chemical Engineering Basics - Section 3
- Chemical Engineering Basics - Section 4
- Chemical Engineering Basics - Section 5
- Chemical Engineering Basics - Section 6
- Chemical Engineering Basics - Section 7
- Chemical Engineering Basics - Section 8
- Chemical Engineering Basics - Section 9
- Chemical Engineering Basics - Section 10
- Chemical Engineering Basics - Section 11
- Chemical Engineering Basics - Section 12
- Chemical Engineering Basics - Section 13
- Chemical Engineering Basics - Section 14
- Chemical Engineering Basics - Section 15
- Chemical Engineering Basics - Section 16
- Chemical Engineering Basics - Section 17
- Chemical Engineering Basics - Section 18
- Chemical Engineering Basics - Section 19
- Chemical Engineering Basics - Section 20
- Chemical Engineering Basics - Section 21
- Chemical Engineering Basics - Section 22
- Chemical Engineering Basics - Section 23
- Chemical Engineering Basics - Section 24
- Chemical Engineering Basics - Section 25
- Chemical Engineering Basics - Section 26
- Chemical Engineering Basics - Section 27
- Chemical Engineering Basics - Section 28


Chemical Engineering Basics - Engineering
Q1: Identify the correct statement with reference to the extractive metallurgy of aluminium.A The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3.
B Approximately 80% of the aluminium deposited on the cathode comes from cryolite.
C Sodium is deposited along with aluminium, but is immediately vaporised.
D Anode effect sets in when the cryolite concentration goes below 40%.
ANS:A - The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3. The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3. In the Hall-Héroult process, which is the primary method for aluminum extraction, the electrolyte typically consists of molten cryolite (Na3AlF6) with small amounts of alumina (Al2O3) added. The addition of alumina helps to lower the melting point of the cryolite and increases its conductivity. This molten electrolyte serves as the medium for the electrolytic reduction of alumina to aluminum metal. The other statements are incorrect:
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