Chemical reaction in which heat is absorbed is called:
endothermic
respiration
exothermic
rusting
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
Chemical reaction in which heat is absorbed are called ____________.