Increases
Decreases
Remains same
Increases linearly
✅ The correct answer is option A.
Chemical Engineering MCQs
The reason why a catalyst increases the rate of reaction is that, it
Decreases the energy barrier for reaction
Increases the activation energy
Decreases the molecular collision diameter
None of these
✅ The correct answer is option A.
The enzyme which can catalyse the conversion of glucose to ethyl alcohol is
Invertase
Maltase
Diastase
Zymase
✅ The correct answer is option D.
For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a __________ reactor.
Stirred tank
Tubular flow
Batch
Fixed bed
✅ The correct answer is option A.
Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the
Activation energy
Equilibrium constant
Heat of reaction
None of these
✅ The correct answer is option A.
Thermodynamic equilibrium constant in a system is affected by
Inerts
Pressure
Temperature
All of the above
✅ The correct answer is option C.
A batch reactor is
Suitable for gas-phase reactions on commercial scale
Suitable for liquid phase reactions involving small production rate
Least expensive to operate for a given rate
Most suitable for very large production rate
✅ The correct answer is option B.
A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by
Diffusion within the pellet
Reaction
External mass transfer
None of the above
✅ The correct answer is option A.
The gas phase reaction 2A ⇋ B is carried out in an isothermal plug flow reactor. The feed consists of 80 mole % A and 20 mole % inerts. If the conversion of A at the reactor exit is 50%, then CA/CA0 at the outlet of the reactor is
2-Mar
5-Aug
1-Mar
3-Aug
✅ The correct answer is option B.
Inversion of cane sugar is an example of
Unimolecular reaction with first order
Bimolecular reaction with second order
Bimolecular reaction with first order
Unimolecular reaction with second order
✅ The correct answer is option C.