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General Principles and processes of Isolation of Elements
medium
Carbon cannot be used in the reduction of $Al_2O_3$ because
A
it is an expensive proposition
B
the enthalpy of formation of $CO_2$ is more than that of $Al|_2O_3$
C
pure carbon is not easily available
D
the enthalpy of formation of $Al_2O_3$ is too high
Solution
Alumina has very high enthalpy of formation.
Hence, carbon cannot be used to reduce alumina to aluminium.
Standard 12
Chemistry
