4
16
8
2
✅ The correct answer is option B.
Chemical Reaction Engineering MCQs
403. The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.
More than
Less than
Equal to
Either B or C
✅ The correct answer is option C.
404. A batch reactor is characterised by
Constant residence time
Variation in extent of reaction and properties of the reaction mixture with time
Variation in reactor volume
Very low conversion
✅ The correct answer is option B.
405. What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction?
0
1
2
3
✅ The correct answer is option A.
406. Exothermic reactions are best carried out in
A CSTR
CSTR in series
A plug flow reactor followed by CSTR
CSTR followed by a plug flow reactor
✅ The correct answer is option D.
407. A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by
keff = k + kg
keff = (k+ kg)/2
keff = (kkg)1/2
1/keff = 1/k + 1/kg
✅ The correct answer is option D.
408. With an increase in pressure in gaseous phase chemical reactions, the fractional conversion __________ when the number of moles decreases.
Increases
Decreases
Remains unaffected
Unpredictable from the data
✅ The correct answer is option A.
409. For multiple reactions, the flow pattern within the vessel affects the
Size requirement
Distribution of reaction products
Both A and B
Neither A nor B
✅ The correct answer is option C.
410. In a continuous flow stirred tank reactor, the composition of the exit stream
Is same as that in the reactor
Is different than that in the reactor
Depends upon the flow rate of inlet stream
None of these
✅ The correct answer is option A.