COMEDK · Chemistry · 21. General Principles and Processes of Isolation of Metals
In the metallurgy of aluminium, when the fused matrix is electrolysed, the overall reduction reaction is
- A \(\mathrm{Al}_{2} \mathrm{O}_{3}+3 \mathrm{C} \longrightarrow 2 \mathrm{Al}+3 \mathrm{CO}\)
- B \(\mathrm{Al}_{2} \mathrm{O}_{3} \longrightarrow 2 \mathrm{Al}^{3+}+3 \mathrm{O}_{2}\)
- C \(2 \mathrm{Al}_{2} \mathrm{O}_{3}+3 \mathrm{C} \longrightarrow 4 \mathrm{Al}+3 \mathrm{CO}_{2}\)
- D \(\mathrm{Al}_{2} \mathrm{O}_{3}+2 \mathrm{CO} \longrightarrow 2 \mathrm{Al}+2 \mathrm{CO}_{2}\)
Answer & Solution
Correct Answer
(C) \(2 \mathrm{Al}_{2} \mathrm{O}_{3}+3 \mathrm{C} \longrightarrow 4 \mathrm{Al}+3 \mathrm{CO}_{2}\)
Step-by-step Solution
Detailed explanation
The overall reduction reaction of fused matrix is \[ 2 \mathrm{Al}_{2} \mathrm{O}_{3}+3 \mathrm{C} \longrightarrow 4 \mathrm{Al}+3 \mathrm{CO}_{2} \]
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