Chemical Reaction Engineering
'Unreacted core model' represents the reaction involving

Roasting of sulphide ores
Manufacture of carbon disulphide from elements
None of these
Combustion of coal particles

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Chemical Reaction Engineering
Promoter.

Atlers the position of equilibrium in a reversible reaction
All of these
Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals
Initiates a chemical reaction and is a catalyst by itself

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