Related Questions

Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of catalyst/rate if notsnowed by pore diffusion) Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)
A Tan hT/T
B Tan T/T
C Tan hT/tan T
D None of these
A catalyst is said to be a negative catalyst, ifit
A Retards the rate of reaction
B Reduces the value of equilibrium constant
C Does not initiate the reaction
D All of the above
For the hydrogenation of oils (i) __________ is commonly used as catalyst and (ii) __________ is a catalyst poison.
A (i) platinum (ii) sulphur
B (i) palladium (ii) oxygen
C (i) nickel (ii) sulphur
D (i) nickel (ii) oxygen
If Thiele modulus is __________ , then the pore diffusion resistance in a catalyst may be considered as negligible.
A 0
B ∞
C > 0.5
Bulk diffusion in catalyst pore __________ with increase in pressure.
A Increases
B Decreases
C Remains unchanged
D Increases exponentially
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
Simple diffusion and facilitated diffusion share the following characteristics
A Do not require ATP
B Saturation kinetics
C Transport solute along concentration gradient
D Can be blocked by specific inhibitors
E Require transport protein
Ordinary diffusion process is also called __________ diffusion.
A Pressure
B Thermal
C Concentration
D Forced
Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as
A Sheradising
B Parkerising
C Anodising
D None of these
He is a person of no importance. Here `on importance' is a/an ____ phrase.
A adjective
B noun
C adverb
D Pteposition

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