AIPMT PRELIMS2012Chemistry-Metallurgy
AIPMT PRELIMS 2012 Chemistry Extraction of Aluminium MCQ Question
Type: MCQ-conceptual-Medium
Aluminium is extracted from alumina (Al₂O₃) by electrolysis of a molten mixture of:
A
Al₂O₃ + KF + Na₃AlF₆
B
Al₂O₃ + HF + NaAlF₄
C
Al₂O₃ + CaF₂ + NaAlF₄
D
Al₂O₃ + Na₃AlF₆ + CaF₂
Correct Answer
Option D
Detailed Explanation
Alumina is dissolved in a mixture of cryolite (Na₃AlF₆) and fluorspar (CaF₂) to lower the melting point for electrolysis.
Found an issue with this question?
Related Questions
More from 2012
In which one of the following options the two examples are correctly matched with their particular type of immunity?
Human Health and DiseaseZoology
Which one of the following statements is correct with respect to immunity?
Human Health and DiseaseZoology
A certain gas takes three times as long to effuse out as helium. Its molecular mass will be:
Gaseous StateChemistry