What is a thermit reaction? What are its types? Give examples

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What is a thermit reaction? What are its types? Give examples.

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The process of igniting Aluminium and Ferric oxide is called thermite reaction. This is an exothermic reaction. Iron obtained in this process is in molten state.**
Fe2O3 (s) + Al (s) →Al2O3 + 2 Fe(l) + Heat
Thermite reaction used for the welding of rails (joining metals) called as thermite welding.