The heat of reaction__________________?

Related Mcqs:

1. 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

2. Molecularity of a reaction__________________?

   A. Is always equal to the overall order of reaction
   B. May not be equal to the order of reaction
   C. Can’t have a fractional value
   D. Both B. and C.

3. Specific rate constant for a second order reaction__________________?

   A. Is independent of temperature
   B. Varies with temperature
   C. Depends on the nature of the reactants
   D. Both B. and C.

4. An irreversible aqueous phase reaction, A + B → P, is carried out in an adiabatic mixed flow reactor. A feed containing 4kmole/m3 of each A and B enters the reactor at 8m3 /hr. If the temperature of the exit stream is never to exceed 390 K, what is the maximum inlet feed temperature allowed? Data: Heat of reaction = – 50 kJ/mole Density of the reacting mixture = 1000kg/m3 Specific heat of reacting mixture = 2kJ/kg.K The above data can be assumed to be independent of temperature and composition?

   A. 190
   B. 290
   C. 390
   D. 490

5. The reaction A → B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m3is fed to the reactor at the rate of 0.01 m3 /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k) is (Data: Heat of reaction at 298 K = – 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100kJ/kmole. K (may be assumed to be independent of temperature)) ?

   A. 400
   B. 500
   C. 600
   D. 1000

6. A batch adiabatic reactor at an initial temperature of 373°K is being used for the reaction, A → B. Assume the heat of reaction is – 1kJ/mole at 373°K and heat capacity of both A and B to be constant and equal to 50J/mole.K. The temperature rise after a conversion of 0.5 will be ____________?

   A. 5°C
   B. 10°C
   C. 20°C
   D. 100°C

7. 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

8. An endothermic second order reaction is carried out in an adiabatic plug flow reactor. The rate of heat generation is ___________________?

   A. Maximum at the inlet of the reactor
   B. Maximum at the exit of the reactor
   C. Maximum at the centre of the reactor
   D. Constant throughout the reactor

9. In a/an ______________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation?

   A. Adiabatic
   B. Isothermal
   C. Non-adiabatic
   D. None of these

10. In case of physical adsorption, the heat of adsorption is of the order of _____________ kcal/kg mole?

    A. 100
    B. 1000
    C. 10000
    D. 100000