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
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 catalyst in a second order reversible reaction increases the rate of the forward reaction
A And decreases that of backward reaction
B And backward reaction equally
C Only
D To a greater extent than that of the backward reaction
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 chemical reaction, the rate constant
A Decreases
B Increases
C Remains constant
D Becomes infinite
When a catalyst increases the rate of forward reaction, the value of rate constant
A Increases
B Decreases
C Remain same
D Becomes infinite
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
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

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