Elements of Chemical Reaction Engineering Questions - Set 28 - ObjectiveBooks

Elements of Chemical Reaction Engineering Questions - Set 28

Practice Test: Question Set - 28

1. Ionic reactions occur in
    (A) Solid state only
    (B) Liquid state only
    (C) Solutions
    (D) Any state

2. The energy balance equation over a tubular reactor under transient conditions is
    (A) An ordinary non-linear differential equation
    (B) An algebraic differential equation
    (C) A linear partial differential equation
    (D) A non-linear partial differential equation

3. With decrease in temperature, the equilibrium conversion of a reversible endothermic reaction
    (A) Decreases
    (B) Increases
    (C) Remain unaffected
    (D) Increases linearly with temperature

4. The rate of reaction of a/an __________ reaction is not affected by temperature rise.
    (A) Autocatalytic
    (B) Photochemical
    (C) Consecutive
    (D) Zero order

5. In a chemical reaction, __________ are conserved.
    (A) Ions
    (B) Masses
    (C) Atoms
    (D) Both (b) & (c)

6. A trickle bed reactor is the one, which
    (A) Has altogether three streams either entering or leaving
    (B) Processes three reactants at different flow rates
    (C) Processes three reactants with same flow rate
    (D) Employs all the three phases (i.e. solid, liquid and gas)

7. Sulphuric acid is used as a catalyst in the
    (A) Hydrogenation of oils
    (B) Gas phase oxidation of SO2 in chamber process
    (C) Alkylation of hydrocarbons
    (D) None of these

8. In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants)
    (A) A
    (B) N
    (C) A + N
    (D) A - N

9. An autothermal reactor is
    (A) Most suitable for a second order reaction
    (B) Most suitable for a reversible reaction
    (C) Completely self-supporting in its thermal energy requirements
    (D) Isothermal in nature

10. Consider the 'n' th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot?
    (A) CA0 Vs t1/2
    (B) ln CA0 Vs t1/2
    (C) CA0 Vs ln t1/2
    (D) ln CA0 Vs ln t1/2

11. Which of the following will favor the reverse reaction in a chemical equilibrium reaction?
    (A) Increasing the concentration of one of the reactants
    (B) Increasing the concentration of one or more of the products
    (C) Removal of at least one of the products at regular interval
    (D) None of these

12. In case of a consecutive unimolecular types first order reaction as shown in the bellow figure, the concentration of component __________ increases continuously with time.
    (A) S
    (B) R
    (C) A
    (D) None of these

13. For a vapor phase catalytic reaction (A + B → P) which follows the Ridel mechanism and the reaction step is rate controlling, the rate of reaction is given by (reaction rate is irreversible, product also absorbs).
    (A) -rA = (k . PA . PB)/(1 + KAPA + KPPP)
    (B) -rA = (k . PA2 - k1PP)/(1 + KAPA + KPPP)
    (C) -rA = (k . PA . PB)/(1 + KAPB + KBPB . KPPP)
    (D) -rA = (k . PA . PB)/(1 + KAPA)

14. In the converter of the contact process for the manufacture of H2SO4 the equilibrium conversion of SO2__________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio of SO2 to air.
    (A) (i) increases (ii) decreases
    (B) (i) decreases (ii) increases
    (C) (i) increases (ii) increases
    (D) (i) decreases (ii) decreases

15. At a given temperature, K1K2 and K3 are equilibrium constants for the following reactions 1, 2, 3 respectively.

    CH4(g) + H2O(g)  CO(g) + 3H2(g), 
    CO(g) + H2O(g)
 CO2(g) + H2(g)
    CH4(g) + 2H2O(g)
 CO2(g) + 4H2(g)

Then K1K2 and K3 are related as:

    (A) K3 = K1.K2
    (B) K3 = (K1.K2)0.5
    (C) K3(K1+K2)/2
    (D) K3 = (K1.K2)2

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