Aluminothermy used for the spot welding of large iron structures is ba – InterviewSolution

1.	Aluminothermy used for the spot welding of large iron structures is based upon the fact that :
Answer» As compared to IRON, aluminium has GREATER AFFINITY for OXYGEN As compared to aluminium, iron has greater affinity for oxygen Reaction between aluminium and oxygen is endothermic Reaction between iron OXIDE and aluminium is exothermic Answer :A::D

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