Question

What kind of reaction is used in welding of rails and why?​

Answer 1

Thermite reaction is the reaction used to join the railway tracks. It is an exothermic redox reaction in which more reactive aluminium metal replaces iron from its oxide to produce molten iron which is used for joining the railway tracks. Note that it is an exothermic reaction.

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Answer 2

Explanation:

Thermite reaction is the reaction used to join the railway tracks. It is an exothermic redox reaction in which more reactive aluminium metal replaces iron from its oxide to produce molten iron which is used for joining the railway tracks. Note that it is an exothermic reaction.