1
>1
∞
≥1
✅ The correct answer is option C.
Chemical Engineering MCQs
__________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction.
Gas film diffusion
Ash diffusion
Chemical reaction
None of these
✅ The correct answer is option C.
Which of the following resistances is not involved in a gas phase catalytic (gas- solid) reaction?
Ash resistance
Gas film and pore surface diffusion resistances for reactants
Surface phenomenon resistance
Gas film and pore surface diffusion resistances for products
✅ The correct answer is option A.
With increase in initial concentration, the fractional conversion of a first order reaction in a given time
Increases
Decreases
Remains constant
Unpredictable
✅ The correct answer is option C.
Carrier in a catalyst increases its
Surface area
Activity
Performance
None of these
✅ The correct answer is option A.
A balanced chemical reaction equation conforms to the law of
Conservation of mass
Avagadro’s hypothesis
Gaseous volumes
None ofthese
✅ The correct answer is option A.
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
2/3 kW
1kW
5/3 kW
4kW
✅ The correct answer is option C.
Molecularity of a reaction
Is always equal to the overall order of reaction
May not be equal to the order of reaction
Can
Both B and C
✅ The correct answer is option D.
A batch reactor suffers from following disadvantage.
Poor product quality control
High labour and handling cost
High shutdown time requirement for emptying, cleaning and refilling
All of the above
✅ The correct answer is option D.
n’ number of plug flow reactors (P.F.R) in series with a total volume ‘V’ gives the same conversion as one P.F.R. of volume
V/n
V
V.n
1/V
✅ The correct answer is option B.