A) it is an expensive proposition
B) the enthalpy of formation of\[C{{O}_{2}}\]is more than that of\[A{{l}_{2}}{{O}_{3}}\]
C) pure carbon is not easily available
D) the enthalpy of formation of\[A{{l}_{2}}{{O}_{3}}\]is too high
Correct Answer: D
Solution :
The enthalpy of formation of\[A{{l}_{2}}{{O}_{3}}\]is very high and hence, it is not possible to reduce it by carbon.
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