The mass of carbon anode consumed in the production of 270 kg of aluminum metallic bauxite by the Hall process is:

The correct answer is: 90kg

• In hall and Heroult process

• 2Al2​O3​⟶4Al+3O2​

• 4C+3O2​⟶2CO2​+2CO↑
• $For\; above\; equation\; mass\; of\; carbon\; is3C=3\times 12=36.$
• $Similarly,\; we\; have\; to\; calculate\; the\; mass\; of\; aluminium4Al=4\times 27=108.$
• So, to produce 108 kg of aluminium, 36 kg of carbon required. Now, we will use the unitary method to calculate the amount of carbon needed to produce 270 kg of aluminium.
• Carbon needed to produce 270kg Aluminium =