Energy required to break hydrogen molecules is
105 k Cal / mol
104 k Cal / mol
103 k Cal / mol
107 k Cal / mol
A chemical reaction in which heat is liberated is called
exothermic reactions
endothermic reactions
decomposition
combination
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 required to break a bond is called
bond energy
bond dissociation energy
bond dissipation
bond enthalpy
The energy released when a new bond is formed is called
Formation of NO from N2 and O2 is a
Exothermic
Combustion
Endothermic
Combination
The value of internal energy depends on
nature of bond
nature of molecules
chemical structure and state of substance
During photosynthesis, plants synthesis one of the following
Carbondioxide
Hydrogen
Starch
Protein
When barium hydroxide and ammonium chloride are mixed in a glass of water, the temperature of the system
falls rapidly
raises slowly
remains same
increases rapidly
Plants synthesise complex molecules from simpler substances by a process known as
Photosynthesis
Decomposition
Displacement
