Chemical Reaction Engineering
For a first order chemical reaction, the rate constant

None ofthese
Is not a function of the unit of time
Has unit of time⁻¹
Changes on changing the concentration units

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Chemical Reaction Engineering
In Langmuir treatment of adsorption,

All the adsorption does not take place by the same mechanism
Extent of adsorption is more than one complete monomolecular layer on the surface
Whole surface of the catalyst does not have the same activity for adsorption and there is attraction between the adsorbed molecule
Whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site

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