Breaking of chemical bond is a
Exothermic reaction
Endothermic reaction
Calcination reaction
Combustion reaction
The enzyme in blood and liver that convents hydrogen peroxide into harmless water and oxygen
Zymase
Catalase
Invertase
Lactase
The catalyst used for the Haber presence of ammonia manufacture
Iron
Nickel
Zeolite
Vanadium pentoxide
Making of chemical bonds is a
Roasting
