From among the following, choose one which is not an exothermic process ?

Related Mcqs:

1. Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug-flow reactor ?

   A. Temperature should be high in the beginning and decreased towards the end of the reaction
   B. Very low temperature should be used throughout the reaction
   C. Very high temperature should be used throughout the reaction
   D. None of these

2. A CSTR is to be designed in which an exothermic liquid phase first order reaction of the type, A → R, is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given: CA0= 5 kmole/m3; XA = 0.5; Feed temperature = reactor temperature = 40°C. Rate constant at 40°C = 1 min-1; (ΔH) = – 40kJ/mole; ρ = 1000kg/m3 CP = 4 J/gm.°C ; q = 10-3 m3/min (ρ and CP are same for the reactant and product streams). The amount of heat to be removed is_________________?

   A. 2/3 kW
   B. 1 kW
   C. 5/3 kW
   D. 4 kW

3. In an exothermic reaction, the energy of the reacting substances as compared to that of products is____________________?

   A. More
   B. Less
   C. Same
   D. Either A. or B., depends on order of reaction

4. Fractional conversion _________________ for an exothermic reversible chemical reaction, when the temperature is maximum?

   A. Increases
   B. Remains unchanged
   C. Decreases
   D. Unpredictable from the data

5. A typical example of an exothermic reversible reaction conducted at high pressure in industry is____________________?

   A. Dehydration of ethanol
   B. Methanol synthesis
   C. Reformation of methane
   D. Polymerisation of ethylene

6. The decomposition of A into B is represented by the exothermic reaction, A ⇌ 2B. To achieve maximum decomposition, it is desirable to carry out the reaction ?

   A. At high P and high T
   B. At low P and high T
   C. At low P and low T
   D. At high P and low T

7. Exothermic reactions are best carried out in ________________?

   A. A CSTR
   B. CSTR in series
   C. A plug flow reactor followed by CSTR
   D. CSTR followed by a plug flow reactor

8. An exothermic reaction takes place in an adiabatic reactor. The product temperature ______________ reactor feed temperature?

   A. Is always equal to
   B. Is always greater than
   C. Is always less than
   D. May be greater or less than

9. For high conversion in a highly exothermic solid catalysed reaction, use a ______________ bed reactor?

   A. Fixed
   B. Fluidised bed reactor followed by a fixed
   C. Fixed bed reactor followed by a fluidised
   D. Fluidised

10. In an exothermic chemical reaction, the reactants compared to the products have__________________?

    A. Higher temperature
    B. More energy
    C. Less energy
    D. Same energy