Related Questions

For a given design of bubble cap, the number of bubble caps to be used per tray is set by the
A Allowable gas velocity through the slots
B Plate spacing
C Diameter of the column
D All of the above
Retinal detachment is common in
A Myopia
B Aphakia
C Elderly people
D Hypermetropia
E Young age
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
__________ is the determining factor for the number of bubble caps to be used per tray.
A Permissible slot velocity
B Tray diameter
C Liquid load
D Vapor load
If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst
A Porosity is very important
B Porosity is of less importance
C Internal surface area is utilised efficiently
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
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as
A Emissivity
B Transmissivity
C Reflectivity
D Intensity of radiation
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
at the wholesale store you can buy an 8-pack of hot dogs for $ 1.55 a 20 pack for $ 3.05 and a 250 pack for $ 22.95 . what is the greatest number of hot dogs you can buy at this store with $ 200?
A 1108
B 2108
C 2100
D 2179

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