Related Questions

In a reversible reaction, a catalyst increases the rate of forward reaction
A Only
B To a greater extent than that of the backward reaction
C And decreases that of the backward reaction
D And the backward reaction equally
When a catalyst increases the rate of forward reaction, the value of rate constant
A Increases
B Decreases
C Remain same
D Becomes infinite
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
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
When a catalyst increases the rate of chemical reaction, the rate constant
A Decreases
B Increases
C Remains constant
D Becomes infinite
The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible __________ process.
A Isobaric
B Isothermal
C Adiabatic
D None of these
The reason why a catalyst increases the rate of reaction is that, it
A Decreases the energy barrier for reaction
B Increases the activation energy
C Decreases the molecular collision diameter
D None of these
When an exothermic reversible reaction is conducted adiabatically, the rate of reaction
A Continuously increases
B Continuously decreases
C Passes through a maximum
D Passes through a minimum
The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.
A More than
B Less than
C Equal to
D Either B or C
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

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