It is a reversible reaction
It is an exothermic reaction
The energy of reacting molecules exceeds the activation energy by absorption of light
None of these
✅ The correct answer is option C.
Chemical Engineering MCQs
The rate of reaction of a/an __________ reaction is not affected by temperature rise.
Autocatalytic
Photochemical
Consecutive
Zero order
✅ The correct answer is option B.
In autocatalytic reactions,
One of the reactants acts as a catalyst
One of the products acts as a catalyst
Catalysts have very high selectivity
No catalyst is used
✅ The correct answer is option B.
The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor.
Greater than
Equal to
Smaller than
Unpredictable from the data
✅ The correct answer is option C.
A catalyst in a chemical reaction
Decreases the activation energy
Alters the reaction mechanism
Increases the frequency of collisions of reacting species
All of the above
✅ The correct answer is option D.
The effectiveness factor for large value of Thiele modulus (L√(K/D1)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm²/second)
L√(K/D1)
1/(L√(K/D1))
1
∞
✅ The correct answer is option B.
The concentration of A in a first order reaction, A → B, decreases
Linearly with time
Exponentially with time
Very abruptly towards the end of the reaction
Logarithmically with time
✅ The correct answer is option B.
Consider the ‘n’ th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot?
CA0 Vs t1/2
Ln CA0 Vs t1/2
CA0 Vs ln t1/2
Ln CA0 Vs ln t1/2
✅ The correct answer is option C.
Space velocity
Describes the extensive operating characteristics of a tubular flow reactor
Is the maximum feed rate pre unit volume of reactor for a given conversion
Is a measure of the ease of the reaction
All of the above
✅ The correct answer is option D.
Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature?
Time
Useful volume of the tank
Diameter of the reactor
None of these
✅ The correct answer is option A.