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

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

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Chemical Reaction Engineering
A catalyst loses its activity due to

Agglomeration of metal particles caused by thermal sintering of the solid surface
Loss in surface area of the active component
All of these
Covering of the catalytic active sites by a foregin substance

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