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Class 10
Chapter 3 Class 10 - Metals and Non-Metals

Assertion (A): In the alumino thermite process, the metals like iron melt due to the heat evolved in the reaction.  

Reason (R): The reaction is:  Fe 2 O 3 + 2Al Al 2 O 3 + 2Fe  


  • The thermite process is an exothermic reaction. 
  • A large amount of heat is evolved in the process (>3000℃) which melts iron.
  • This heat is also used for welding. 



  • The Assertion is True.
  • Reason is also True.

And the Reason is NOT the correct explanation for the assertion.  

So, the correct answer is (b)

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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo