Question

what is thermite reaction ?how is it used to join the railway tracks or cracked machine parts

Answer 1

Thermit reaction is the processes of reducing oxides to metals. This can be done using displacement reaction.

3ZnO + 2Al -> 3Zn + Al2O3

This can be used for mending broken parts of iron, railway tracks by displacing the metal by reacting with another metal.

Hope this helps