A chemical reaction which takeplace with absorption of heat is called
exothermic reactions
endothermic reactions
decomposition reaction
combination
For exothermic reaction, ΔH is
Zero
Positive
Negative
One
A chemical reaction in which heat is liberated is called
decomposition
Energy required to break hydrogen molecules is
105 k Cal / mol
104 k Cal / mol
103 k Cal / mol
107 k Cal / mol
The ΔH value (heat content value) for endothermic is
positive
negative
zero
one
Energy required to break one mole of chlorine molecule is
57.8 k cal
55.2 k cal
56 k cal
48 k cal
The energy released when a new bond is formed is called
bond energy
bond enthalpy
bond dissociation energy
bond dissipation
Formation of ammonia is a
exothermic
endothermic
combustion
displacement reaction
The energy required to break a bond is called
Photosynthesis is a
exothermic reaction
endothermic reaction