Explore topic-wise MCQs in Chemical Reaction Engineering.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Reaction Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

Percy prepares vegetable curry (liquid) in a pressure cooker. If the raw potatoes are P, the raw tomatoes are T, the raw onions are O, and the cooked meal is M, then 2P + T + O 3M may represent the cooking process. Sometime during the process, Manu opens the lid and checks the curry to find that the potatoes are half-cooked (take XP = 0.5). Volume of the cooker is 5L and CPo = CTo = COo = 1.5. What can you say about the composition in the cooker at the instant of time when the lid is opened, if initial temperature was 310K?

A. X<sub>T</sub> = 0.35
B. C<sub>O</sub> = 1.125
C. T = 380K
D. C<sub>M</sub> = 2.5
Answer» C. T = 380K
Discussion
2.

Consider the gas reaction A + B 3CWhich of the following cannot be the outlet composition if FAo = 100 mol/s in a flow reactor with vo = 10 L/s and the feed is an equimolar mixture of A and B? Take the initial conditions as 1 atm, 273K and outlet condition as 2 atm, 300K.

A. X<sub>A</sub> = 0.2, C<sub>B</sub> = 13.23, C<sub>c</sub> = 5.45
B. X<sub>A</sub> = 0.4, C<sub>B</sub> = 9.1, C<sub>c</sub> = 18.2
C. X<sub>A</sub> = 0.6, C<sub>B</sub> = 5.6, C<sub>c</sub> = 25.19
D. X<sub>A</sub> = 0.8, C<sub>B</sub> = 2.6, C<sub>c</sub> = 31.19
Answer» B. X<sub>A</sub> = 0.4, C<sub>B</sub> = 9.1, C<sub>c</sub> = 18.2
Discussion
3.

Consider the liquid reaction 3A + 2B 4CWhat could be the outlet composition if CAo = 100 mol/L in a batch reactor and the feed is an equimolar mixture of A and B? Assume that 5 mol of C was already present in the reactor initially.

A. X<sub>A</sub> = 0.2, C<sub>B</sub> = 86.66, C<sub>c</sub> = 31.66
B. X<sub>A</sub> = 0.4, C<sub>B</sub> = 76.66, C<sub>c</sub> = 58.33
C. X<sub>A</sub> = 0.6, C<sub>B</sub> = 60, C<sub>c</sub> = 80
D. X<sub>A</sub> = 0.8, C<sub>B</sub> = 43.33, C<sub>c</sub> = 106.66
Answer» B. X<sub>A</sub> = 0.4, C<sub>B</sub> = 76.66, C<sub>c</sub> = 58.33
Discussion
4.

For any type of reactor, the material balance equation is valid.[Rate of reactant flowing into element of volume] = [Rate of reactant flowing out of element of volume] + [Rate of reactant loss due to chemical reaction within the volume element] + [Rate of accumulation of reactant in the volume element]

A. nWhich of the following is false?
B. Two terms disappear in case of a batch reactor
C. Only three terms are non-trivial when we analyze a semi batch reactor
D. One term becomes zero for a steady-state flow reactor
E. There is no flow of reactants in a batch reactor
Answer» C. Only three terms are non-trivial when we analyze a semi batch reactor
Discussion
5.

Which of the following is NOT a part of reactor design?

A. Size of the reactor
B. Type of the reactor
C. Flow rates of the reactant and product streams
D. Method of operation
Answer» D. Method of operation
Discussion