Displacement

Question 1

Displacement reaction

Answer 1

A reaction where a more reactive element takes the place of a less reactive element in a compound.

E.g. Aluminium + iron oxide —> aluminium oxide + iron.

Here the aluminium is much more reactive with oxygen than iron so it is displaced. The iron is molten.

Only happens ONE way

Question 2

Thermite reaction

Answer 2

Used to melt iron and for example join two sections of a railway.