A) Ca
B) Al + Fe
C) Fe
D) \[Al+F{{e}_{2}}{{O}_{3}}\]
Correct Answer: D
Solution :
In thermite welding, a mixture of aluminium powder and iron oxide \[(F{{e}_{2}}{{O}_{3}})\] in the ratio of 1 : 3 is used. This mixture is called thermite mixture.
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