The green pigment present in the leaves of plants in
Vat dye
Phenolphthalein
Chlorophyll
Chloroform
The optimum temperature in the manufacture of ammonia
450oC
300oC
400oC
150oC
The minimum amount of energy needed to begin to break bonds
Threshold energy
Activation energy
Heat enthalpy
Entropy
The metals most commonly used as catalysts
Alkali metals
Alkaline earth metals
Transition elements
Halogens
