Related Questions

Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.
A Proportional to
B Independent of
C Inversely proportional to
D Proportional to the square of
Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the
A Activation energy
B Equilibrium constant
C Heat of reaction
D None of these
__________ catalytic reaction is involved in the thermal cracking of gas oil.
A Homogeneous
B Homogeneous non
C Heterogeneous
D Heterogeneous non
Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature?
A Pore diffusion
B Film diffusion
C Ash layer diffusion
D Chemical reaction
If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion.
A Film
B Ash layer
C Pore
D None of these
Which of the following is not a chemical step in a fluid solid catalytic reaction?
A Surface chemical reaction
B Adsorption
C Desorption
D None of these
__________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction.
A Gas film diffusion
B Ash diffusion
C Chemical reaction
D None of these
A catalytic agent such platinum may be used so that the chemical reaction reaction more rapidly .
A such
B that
C reaction
D rapidly
Non-catalytic fluid-solid reactions are represented by __________ model.
A Continuous reaction
B Unreacted core
C Both A and B
D Neither A and B
For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.
A Physical
B Chemical
C Both A and B
D Neither A nor B

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