Chemical Reaction Engineering
A catalyst loses its activity due to

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

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Chemical Reaction Engineering
A space time of 3 hours for a flow reactor means that

The time required to process one reactor volume of feed (measured at specified conditions) is 3 hours
Three reactor volumes of feed can be processed every hour
It takes three hours to dump the entire volume of the reactor with feed
Conversion is cent per cent after three hours

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Chemical Reaction Engineering
For an ideal gas mixture undergoing a reversible gaseous phase chemical reaction, the equilibrium constant

Is independent of pressure
Increases /decreases with pressure depending on the stoichiometric co-efficients of the reaction
Decreases with pressure
Increases with pressure

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