331. The exit age distribution of fluid leaving a vessel is used to know the
Activation energies of a reaction
Reaction mechanism
Extent of non-ideal flow in the vessel
None of these
✅ The correct answer is option C.
Chemical Reaction Engineering MCQs
332. In a chemical reaction, __________ are conserved.
Ions
Masses
Atoms
Both B & C
✅ The correct answer is option D.
333. The role of a catalyst in a chemical reaction is to change the
Equilibrium constant
Activation energy
Final products
Heat of reaction
✅ The correct answer is option B.
334. In an ideal mixed reactor (at steady state), the
Space time is equivalent to holding time for constant density systems
Composition throughout the reactor remains same
Exit stream has the same composition as the fluid within the reactor
All of the above
✅ The correct answer is option D.
335. For the liquid phase zero order irreversible reaction A → B, the conversion of A in a CSTR is found to be 0.3 at a space velocity of 0.1min⁻¹ . What will be the conversion for a PFR with a space velocity of 0.2 min⁻¹? Assume that all the other operating conditions are the same for CSTR and PFR.
0.15
0.3
0.6
0.9
✅ The correct answer is option C.
336. A gaseous reactant is introduced in a mixed reactor of 3 litres volume at the rate of 1 litre/second. The space time is __________ seconds.
1
3
1-Mar
32
✅ The correct answer is option B.
337. For a first order chemical reaction, the rate constant
Changes on changing the concentration units
Is not a function of the unit of time
Has unit of time⁻¹
None ofthese
✅ The correct answer is option C.
338. BET apparatus
Measures the catalyst surface area directly
Operates at very high pressure
Is made entirely of stainless steel
None of these
✅ The correct answer is option D.
339. From collison theory, the reaction rate constant is proportional to
Exp(- E/RT)
Exp(- E/2RT)
√T
Tm.exp(- E/RT)
✅ The correct answer is option D.
340. Which of the following curves shows the effect of temperature on the extent of gas-solid adsorption at a given pressure?
Langmuir adsorption isotherm
Adsorption isobar
Freundlich adsorption isotherm
None of these
✅ The correct answer is option B.