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
The equilibrium constant of a catalytic chemical reaction __________ due to the presence of a catalyst.
A Increases
B Decreases
C Remains unaffected
D Unpredictable from the data
A catalyst in a chemical reaction __________ free energy change in the reaction.
A Increases
B Decreases
C Either A or B; depends on the type of catalyst
D Neither A nor B
A catalytic agent such platinum may be used so that the chemical reaction reaction more rapidly .
A such
B that
C reaction
D rapidly
The role of a catalyst in a chemical reaction is to change the
A Equilibrium constant
B Activation energy
C Final products
D Heat of reaction
Which is a catalyst promoter used in catalytic ammonia synthesis reaction?
A Al2O3
B Cr2O3
C K2O
D MnO
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 reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.
A Catalytic
B Autocatalytic
C Photochemical
D None of these
The reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.
A Biochemical
B Photochemical
C Catalytic
D Autocatalytic
The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are
A Always irreversible
B Insensitive to temperature changes
C Mostly irreversible
D Highly temperature sensitive

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