Heat is evolved during (i) endothermic reaction (ii) displacement reaction (iii) combustion reaction (iv) combination reaction

Answer: (iii) Combustion Reaction
Reason: Combustion Reaction is an exothermic reaction hence heat is given out. 

  • 6
combosition reaction  
exothermic heat is given out
  • 5
Endothermic reaction
  • -5
Combustion reaction
The heat is released.
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