In the joining of railway tracks, iron oxide is made to react with
[amp_mcq option1=”Aluminium” option2=”Zinc” option3=”Copper” option4=”Tin” correct=”option1″]
This question was previously asked in
UPSC CDS-2 – 2022
– The specific reaction used for rail welding is between iron(III) oxide (Fe₂O₃) and aluminium (Al): 2Al + Fe₂O₃ → Al₂O₃ + 2Fe + Heat.
– The molten iron produced at high temperature fills the gap between the rails, creating a weld.