Chemical Reaction Engineering
Brunaur, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation?

Langmuir
The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer (except the first one) is involved in each of the evaporation process
There is no dynamic equilibrium between successive layer
None of these

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Chemical Reaction Engineering
For a zero order chemical reaction, the

All of these
Products concentration increases linerarly with time
Plot of products concentration with time is a straight line through the origin
Half life period is directly proportion to the initial concentration of the reac-tants

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