Use high pressure and eliminate inerts, when a > b
Avoid recycle, when a > b
Use batch reactor or plug flow reactor, when a > b
Use CSTR with a high conversion, when a > b
✅ The correct answer is option B.
Chemical Reaction Engineering MCQs
The rate of a homogeneous reaction is a function of
Temperature and pressure only
Temperature and composition only
Pressure and composition only
All of the above
✅ The correct answer is option D.
Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of catalyst/rate if notsnowed by pore diffusion) Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)
Tan hT/T
Tan T/T
Tan hT/tan T
None of these
✅ The correct answer is option A.
Half-life period for a first order reaction is __________ the initial concentration of the reactant.
Directly proportional to
Inversely proportional to
Independent of
None of these
✅ The correct answer is option C.
The conversion XA and residence time data are collected for zero order liquid phase reaction in a stirred tank reactor. Which of the following will be a straight line?
XA Vs . τ
XA Vs ln τ
XA/(1 – XA)Vs τ
XA(1 – XA)Vs τ
✅ The correct answer is option A.
The reaction A → B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m³ is 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))
400
500
600
1000
✅ The correct answer is option C.
Differential method for analysing the kinetic data is used
For testing complicated mechanisms
When the data are scattered
When rate expressions are very simple
None of these
✅ The correct answer is option A.
Calcination reaction of limestone (CaCO₃ → CaO + CO₂) goes to completion in the rotary kiln, because
CaO is not dissociated
CO₂ escapes continuously
Of high calcination temperature
CaO is more stable than CaCO₃
✅ The correct answer is option B.
Sulphuric acid is used as a catalyst in the
Hydrogenation of oils
Gas phase oxidation of SO₂ in chamber process
Alkylation of hydrocarbons
None of these
✅ The correct answer is option C.
Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature?
Pore diffusion
Film diffusion
Ash layer diffusion
Chemical reaction
✅ The correct answer is option B.