Chemical Reaction Engineering
In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will

Be halved
Become one fourth
Remain the same
Also be doubled

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Chemical Reaction Engineering
In Langmuir treatment of adsorption,

Whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site
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

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Chemical Reaction Engineering
The reaction A → B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m³ is fed to the reactor at the rate of 0.01 m³ /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k)is (Data: Heat of reaction at 298 K = - 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100kJ/kmole. K (may be assumed to be independent of temperature))

1000
500
600
400

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Chemical Reaction Engineering
Promoter.

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

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