Question

Thermite welding is caused by the formation of which compound?

• A. Al
• B. Fe
• C. Fe\(_2\)O\(_3\)
• D. FeO

Hint:

The Thermite reaction is highly exothermic and can generate temperatures exceeding 2500°C, which is why it is used in welding applications such as rail track repair.

Answer 1

The Correct Option is C

Thermite welding is a process that involves a highly exothermic oxidation-reduction reaction. The key reaction in thermite welding occurs between aluminum (Al) and iron(III) oxide (Fe₂O₃). The chemical reaction can be represented by the following equation:

Fe₂O₃ + 2 Al → 2 Fe + Al₂O₃ + Heat

This reaction involves the reduction of iron(III) oxide to produce iron (Fe) and the oxidation of aluminum to form aluminum oxide (Al₂O₃). The large amount of heat generated during the reaction melts the produced iron, which allows it to be used for welding purposes.

Therefore, the correct compound involved in the formation of thermite welding is iron(III) oxide, Fe₂O₃.