Related Questions

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
Which of the following are products and services bought by final consumers for personal consumption? These include convenience products, shopping products, specialty products, and unsought products.
A Material and parts
B Consumer products
C Industrial products
D Capital items
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
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
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
A bio-catalyst produced by living cells which acts independent of the cell is called a/an
A Substrate
B Enzyme
C Nutrient
D None of these
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
Which is the most effective catalyst used in catalytic cracking of petroleum products?
A Iron oxide
B Nickel
C Vanadium pentoxide
D Zeolite
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

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