Chemical Reaction Engineering Applications Test Questions - Set 17 - ObjectiveBooks
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Chemical Reaction Engineering Applications Test Questions - Set 17

Practice Test: Question Set - 17


1. Fractional conversion __________ with increase in pressure for ammonia synthesis reaction i.e., N2 + 3H2  2NH3.
    (A) Increases
    (B) Decreases
    (C) Remains unchanged
    (D) Unpredictable from the data

2. Velocity of a chemical reaction
    (A) Decreases with increase in temperature
    (B) Increases with increase of pressure of reactants for all reactions
    (C) Decreases with increase of reactant concentration
    (D) None of these

3. Which of the following is used for calcination of limestone and dolomite in industrial practice?
    (A) Fluidized bed reactor
    (B) Moving bed reactor
    (C) Fixed bed reactor
    (D) None of these

4. For a __________ order chemical reaction as shown in the bellow figure, the half life period is independent of the initial concentration of the reactant A.
    (A) Zero
    (B) First
    (C) Second
    (D) Third

5. A first order irreversible reaction, A → B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that __________ in the two reactors.
    (A) Both conversion as well as concentration are same
    (B) Conversion in both will be the same but concentrations will be different
    (C) Both the conversion as well as concentrations will be different
    (D) None of these

6. Fluidized bed reactor is characterized by
    (A) Uniformity of temperature
    (B) Comparatively smaller equipment
    (C) Very small pressure drop
    (D) Absence of continuous catalyst regeneration facility

7. Threshold energy in a reaction is equal to the
    (A) Activation energy
    (B) Normal energy of reactants
    (C) Sum of (a) & (b)
    (D) Neither (a) nor (b)

8. The rate expression for the gaseous phase reaction, CO + 2H2  CH3OH, is given by as shown in the bellow figure. Which of the following is not possible?
    (A) α = 1, β = 1, γ =1
    (B) α = 1, β = 2, γ = 1
    (C) α = 1/3, β = 2/3, γ = 1/3
    (D) α = 1/2, β = 1, γ = 1/2

9. Which of the following will give maximum gas conversion?
    (A) Fixed bed reactor
    (B) Fluidized bed reactor
    (C) Semi-fluidized bed reactor
    (D) Plug-flow catalytic reactor

10. A liquid decomposes by irreversible first order kinetics and the half life period of this reaction is 8 minutes. The time required for 75% conversion of the liquid will be __________ minutes.
    (A) 4
    (B) 8
    (C) 12
    (D) 16

11. A first order homogeneous reaction of the type X → Y → Z (consecutive reaction) is carried out in a CSTR. Which of the following curves respectively show the variation of the concentration of XY and Z with time?

    (A) I, II, III
    (B) III, II, I
    (C) III, I, II
    (D) II, III, I

12. The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reactions with low activation energy are:
    (A) Always irreversible
    (B) Insensitive to temperature changes
    (C) Mostly irreversible
    (D) Highly temperature sensitive

13. A non-catalytic chemical reaction of the type as shown in the bellow figure is called a __________ reaction.
    (A) Parallel
    (B) Series
    (C) Series-parallel
    (D) None of these

14. Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction?
    (A) Ash resistance
    (B) Gas film and pore surface diffusion resistances for reactants
    (C) Surface phenomenon resistance
    (D) Gas film and pore surface diffusion resistances for products

15. In Langmuir treatment of adsorption,
    (A) Whole surface of the catalyst does not have the same activity for adsorption and there is attraction between the adsorbed molecule
    (B) Whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site
    (C) All the adsorption does not take place by the same mechanism
    (D) Extent of adsorption is more than one complete monomolecular layer on the surface

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