Chemical Reaction Engineering
Promoter.

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

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Chemical Reaction Engineering
A Catalyst

Increases the equilibrium concentration of the product
Changes the equilibrium constant of the reaction
Shortens the time to reach the equilibrium
None of these

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Chemical Reaction Engineering
Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is