rA = rB
rA = -rB
rA = 2rB
rA = rB/2
✅ The correct answer is option B.
Chemical Reaction Engineering MCQs
If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion.
Film
Ash layer
Pore
None of these
✅ The correct answer is option A.
The most suitable reactor for carrying out an auto-thermal reaction is a
Batch reactor
CSTR
Semi-batch reactor
Plug-flow reactor
✅ The correct answer is option B.
The catalytic activity of enzymes is due to their capacity to lower the __________ energy.
Activation
Potential
Kinetic
None of these
✅ The correct answer is option A.
In the converter of the contact process for the manufacture of H₂SO₄ the equilibrium conversion of SO₂ __________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio of SO₂ to air.
(i) increases (ii) decreases
(i) decreases (ii) increases
(i) increases (ii) increases
(i) decreases (ii) decreases
✅ The correct answer is option B.
A stirred tank reactor compared to tubular-flow reactor provides
More uniform operating conditions
Permits operation at the optimum temperature for a long reaction time
Higher overall selectivity for a first order consecutive reaction
All of the above
✅ The correct answer is option D.
A trickle bed reactor is the one, which
Has altogether three streams either entering or leaving
Processes three reactants at different flow rates
Processes three reactants with same flow rate
Employs all the three phases (i.e.. .solid, liquid and gas)
✅ The correct answer is option D.
For an ideal mixed flow reactor (CSTR), the exit age distribution E(t) is given by
A dirac delta function
A step function
A ramp function
None of the above
✅ The correct answer is option D.
Organic catalysts differ from the inorganic catalyst in the sense that the former is
Active at cryogenic temperatures only
Prohibitively costly
Proteinous in nature
Active at very high temperature only
✅ The correct answer is option C.