What is the meaning of thermit reaction in chemistry?

Answer 1

It's a reaction of aluminum with another metal (like iron) that releases great quantities of heat and flame. To do one yourself, you can mix dehydrated rust (iron oxide) with aluminum powder and sugar as a catalyst. Add a drop of sulfuric acid and then get the heck away...you'll see a bright flame resembling fireworks, and a small lump of molten iron will be left behind, that you can grab after it cools.

Answer 2

A reaction in which things combine is reversible if those things also fall apart easily enough. The forward reaction is the combination of components to form the final product. The reverse reaction is when the combination breaks apart again.

Answer 3

Using Al to reduce metals below it in the electrochemical series.