Question

Thermite is a mixture of -

• A. 3 Parts of powered Al and 1 part of $F{e}_2{O}_3$
• B. 1 parts of powered Al and 3 part of $F{e}_2{O}_3$
• C. 1 part of powered Al and 1 part of $F{e}_2{O}_3$
• D. 2 Parts of powered Al and 1 part of $F{e}_2{O}_3$

Answer 1

The correct option is B 1 parts of powered Al and 3 part of $F{e}_2{O}_3$

Thermite is a mixture of one metal oxide and another metal powder. Usually aluminium is used as metal that reduces the metal oxide
e.g. iron thermite $(F{e}_2{O}_3+Al)$
chromium thermite $(C{r}_2{O}_3+Al)$
copper thermite $(CuO+Al)$
A common thermite contains ferric oxide and aluminium in $3:1$ ratio by mass. It is used in thermite welding of broken iron parts. The reduction of ferric oxide by aluminium is highly exothermic and therefore the iron formed will be in the molten state.
Hence option B is correct.