For a first order isothermal chemical reaction in a porous catalyst, the effectiveness factor is 0.3. The effectiveness factor will increase if the____________________?

A. Catalyst size is reduced or the catalyst diffusivity is reduced
B. Catalyst size is reduced or the catalyst diffusivity is increased
C. Catalyst size is increased or the catalyst diffusivity is reduced
D. Catalyst size is increased or the catalyst diffusivity is increased

A second order liquid phase reaction, A → B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume of the reacting mixture is V and the density of the liquid mixture is constant. The mass balance for A is_______________________?

A. d(VCA)/dt = -F (CAF – CA) – kCA2V
B. d(VCA)/dt = F (CAF – CA) – kCA2V
C. d(VCA)/dt = -FCA – kCA2V
D. d(VCA)/dt = FCAF – kCA2V

Following isothermal kinetic data are obtained in a basket type of mixed flow reactor for a porous catalyst. Determine the role of pore diffusion and external mass transfer processes ?

A. Strong pore diffusion control and mass transfer not controlling
B. Both pore diffusion and mass transfer not controlling
C. Both pore diffusion and mass transfer controlling
D. Mass transfer controlling

The equilibrium constant of a catalytic chemical reaction _______________ due to the presence of?

a catalyst.
A. Increases
B. Decreases
C. Remain unaffected

_____________ gas is normally employed in B.E.T. method of finding out the surface area of catalyst?

A. N2
B. H2
C. CO2
D. He

Catalyst is a substance, which ________________ chemical reaction?

A. Increases the speed of a
B. Decreases the speed of a
C. Can either increase or decrease the speed of a
D. Alters the value of equilibrium constant in a reversible

What is the dispersion number for a CSTR ?

A. 0
B. 1
C. < 1
D. ∞

The rate constant of a chemical reaction increases by increasing the______________________?

A. Temperature
B. Pressure
C. Reactant’s concentration
D. None of these

Arrhenius equation shows the variation of ___________________ with temperature?

A. Reaction rate
B. Rate constant
C. Energy of activation
D. Frequency factor

The rate of the chemical reaction A → B doubles as the concentration of A i.e.., CA is doubled. If rate of reaction is proportional to CA n, then what is the value of n for this reaction ?

A. 0
B. 0.5
C. 1
D. 2