When all the limiting reactant is consumed in the reaction, the operational yield _______________ the relative yield?

A. Is greater than
B. Is smaller than
C. Equals
D. Can be either greater or smaller than (depends on the type of reaction)

If the pore diffusion controls in a catalytic reaction, the apparent activation energy Ea is equal to___________________?

A. The intrinsic activation energy E
B. (E + ED) where ED is activation due to diffusion
C. (E + ED)/2
D. ED/2

In flow reactors, the performance equations interrelate the rate of reaction to the___________________?

A. Feed rate
B. Reactor volume
C. Extent of reaction
D. All A., B. and C.

Reaction rate equation for the bellow figure reaction, If S at is present in large excess, what is the order of this reaction ?

A. Zero
B. One
C. Two
D. Three

The unit of frequency factor in Arrhenius equation is_______________?

A. Same as that of rate constant
B. Same as that of activation energy
C. Dimensionless
D. None of these

The rate of the heterogeneous catalytic reaction A(g) + B(g) → C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction is_______________?

A. Absorption of A
B. Surface reaction between absorbed A and absorbed B
C. Surface reaction between absorbed A and B in the gas phase
D. Surface reaction between A in the gas phase and absorbed B

The performance of a cascade of CSTR’s can be improved by adding__________________?

A. A P.F. reactor in series
B. A P.F. reactor in parallel
C. More CSTR’s in series
D. More CSTR’s in parallel

Which of the following is a characteristic of an ideal plug flow reactor ?

A. Axial dispersion
B. Flat velocity profile
C. Uniform mixing
D. None of these

When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is__________________?

A. > 1
B. < 1
C. 1
D. 0

The catalytic converter for conversion of SO2 to SO3 by contact process should have a feed with SO2 content between___________________?

A. 2-5 %
B. 7-10 %
C. 12-15 %
D. 20-25 %