2023 · Q74
Which of the following statements are true for the reaction of Fe2O3 with aluminium?
- 1It is known as the thermite reaction.
- 2The heat evolved is used for welding purpose.
- 3Aluminium metal acts as an oxidizing agent.
- 4Molten Fe and Al are formed at the end of the reaction.
Select the correct answer using the code given below:
General KnowledgeChemistry
- A1 and 2
- B1 and 3
- C2 and 4
- D1 and 4
Explanation
Statements 1 and 2 are true: Fe2O3 + 2Al -> 2Fe + Al2O3 is the thermite reaction, whose intense evolved heat melts the iron and is used for welding rails. Statement 3 is false: aluminium is the reducing agent (it is itself oxidised to Al2O3), not the oxidising agent. Statement 4 is false: the products are molten iron and aluminium oxide (Al2O3), not molten aluminium. Hence 1 and 2 only.