Question

how is thermite reaction how is it used to join the railway track of ignition parts

Answer 1

Thermite reaction is the reaction in which aluminum displaces iron from it's oxide , and it is highly exothermic that the iron obtained Is in molten state.

2Al + Fe2O3---------> Al2O3 + 2Fe + Heat.

This molten iron hardens to form a solid mass and thus used in welding railway tracks.