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ICSE Class 10 Chemistry Question 27 of 64

Metallurgy — Question 27

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Question

Question 1.2(2014)

Aluminium powder is used in thermite welding because :

  1. it is strong reducing agent
  2. it is strong oxidizing agent
  3. it is corrosion resistant
  4. it is a good conductor of heat.
Answer

it is strong reducing agent.

Reason — Aluminium is a strong reducing agent, it reduces Fe2O3, to Fe which fills the gap. Hence it is used for thermite (Fe2O3) welding.