The reaction in which heat is liberated is called _____________ reaction.
Endothermic
Exothermic
Combination
Substitution
An exothermic reaction is a chemical reaction that releases energy by light or heat.
Example: Burning of coal, fuel etc.
The reaction in which energy is absorbed is called as a/an _____________.
The process of respiration is :
(a) an oxidation reaction which is endothermic
(b) a reduction reaction which is exothermic
(c) a combination reaction which is endothermic
(d) an oxidation reaction which is exothermic