Question

In Goldschmist alumino thermic process, thermite mixture is:

• A. 3 parts $F{e}_2{O}_3$ and 2 parts $Al$
• B. 3 parts $A{l}_2{O}_3$ and 4 parts $Al$
• C. 1 part $F{e}_2{O}_3$ and 1 part $Al$
• D. 3 parts $F{e}_2{O}_3$ and 1 part $Al$

Answer 1

The correct option is D 3 parts $F{e}_2{O}_3$ and 1 part $Al$

Aluminium is chosen as metal for thermite welding since it has strong affinity towards oxygen and its oxide, ${Al}_2{O}_3$ is a highly exothermic compound. A common thermite contains ferric oxide and aluminium in 3:1 ratio by mass. Hence, it is used in thermite welding of broken iron parts.

Hence, In Goldschmist alumino thermic process, thermite mixture is 3 parts ${Fe}_2{O}_3$ and 1 part $Al$.