Chemical Reaction Engineering MCQs
Practice free Chemical Reaction Engineering multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 496 questions — no login required.
Question 460easy
Half life period of a chemical reaction is proportional to CA0-1, if the reaction is of __________ order.
Question 461easy
Pick out the wrong statement below:
I. For the same conversion, the holding time required in a batch reactor, is always equal to the space time required in a PFR.
II. Two mixed reactors of unequal size are available for producing a specified product, formed by a homogenous second order reaction. To achieve maximum production rate, the smaller reactor should be placed in series before the larger reactor.
III. Arrehenius equation describing the effect of temperature on rate constant is given by, $${\text{K}} = {\text{A}}.{{\text{e}}^{ - \frac{{{\text{Ea}}}}{{{\text{RT}}}}}}$$
IV. The mechanism for the decomposition of CH3CHO into CH4 and CO in presence of I2 is:
CH3CHO + I2 → CH3I + HI + CO; slow
CH3I + HI → CH4 + I2; fast
Then the rate of disappearance CH3CHO is equal to K.CCH3l.CHl and acts as a catalyst.
I. For the same conversion, the holding time required in a batch reactor, is always equal to the space time required in a PFR.
II. Two mixed reactors of unequal size are available for producing a specified product, formed by a homogenous second order reaction. To achieve maximum production rate, the smaller reactor should be placed in series before the larger reactor.
III. Arrehenius equation describing the effect of temperature on rate constant is given by, $${\text{K}} = {\text{A}}.{{\text{e}}^{ - \frac{{{\text{Ea}}}}{{{\text{RT}}}}}}$$
IV. The mechanism for the decomposition of CH3CHO into CH4 and CO in presence of I2 is:
CH3CHO + I2 → CH3I + HI + CO; slow
CH3I + HI → CH4 + I2; fast
Then the rate of disappearance CH3CHO is equal to K.CCH3l.CHl and acts as a catalyst.
Question 462easy
__________ gas is normally employed in B.E.T. method of finding out the surface area of catalyst.
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Question 463easy
For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of 'P' is doubled. If the reaction rate is proportional to Cpn, then what is the value of 'n' for this chemical reaction
Question 464easy
If in the gaseous phase reaction, N2O4 ⇋ 2NO2, x is the part of N2O4 which dissociates, then the number of molecules at equilibrium will be
Question 465easy
To maximise the formation of R in the simultaneous reaction
A + B → R , rR = 2CA0.5.CB2
A + B → S , rS = 1.5 CA.CB
We should have
A + B → R , rR = 2CA0.5.CB2
A + B → S , rS = 1.5 CA.CB
We should have
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Question 466easy
Rate constant 'k' and absolute temperature 'T' are related by collision theory (for bimolecular) as
Question 467easy
An irreversible aqueous phase reaction, A + B → P, is carried out in an adiabatic mixed flow reactor. A feed containing 4 kmole/m3 of each A and B enters the reactor at 8 m3/hr. If the temperature of the exit stream is never to exceed 390 K, what is the maximum inlet feed temperature allowed?
(Data: Heat of reaction = -50 kJ/mole, Density of the reacting mixture = 1000 kg/m3, Specific heat of reacting mixture = 2 kJ/kg.K)
The above data can be assumed to be independent of temperature and composition.
(Data: Heat of reaction = -50 kJ/mole, Density of the reacting mixture = 1000 kg/m3, Specific heat of reacting mixture = 2 kJ/kg.K)
The above data can be assumed to be independent of temperature and composition.
Question 468easy
The rate of a gas phase reaction is given by K.CA.CB. If the volume of the reaction vessel is reduced to $${\frac{1}{4}^{{\text{th}}}}$$ of its initial volume, then the reaction rate compared to the original rate will be __________ times.