A) 180 kg
B) 270 kg
C) 540 kg
D) 90 kg
Correct Answer: A
Solution :
In hall and Heroult process \[2A{{l}_{2}}{{O}_{3}}\xrightarrow{{}}4Al+3{{O}_{2}}\] \[4C+3{{O}_{2}}\xrightarrow{{}}2C{{O}_{2}}+2CO\uparrow \] Only for removal of \[\text{C}{{\text{O}}_{\text{2}}}\text{,}\]following equation is possible \[2A{{l}_{2}}{{O}_{3}}+\underset{3\,\times \,12\,=\,96}{\mathop{3C}}\,\xrightarrow{{}}\underset{4\,\times \,27=108}{\mathop{4Al}}\,+3C{{O}_{2}}\] \[\because \]For 108 kg of Al, 36 g of C is required in above reaction \[\therefore \] For 270 kg of Al require amount of C \[=\frac{36}{108}\times 270=90\,kg\]
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