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- Question
Pick out the wrong statement pertaining to space velocity of flow reactors.
Options- A. The unit of space velocity is (time)-1 .
- B. The space velocity of 3 hr-1 means that three reactor volumes of feed at specified conditions are being fed into the reactor every hour.
- C. The space velocity of 3 hr-1 means that one third reactor volume of feed at specified conditions are being fed into the reactor.
- D. none of these.
- Correct Answer
- The space velocity of 3 hr-1 means that one third reactor volume of feed at specified conditions are being fed into the reactor.
- 1. Specific rate constant for a second order reaction
Options- A. is independent of temperature.
- B. varies with temperature.
- C. depends on the nature of the reactants.
- D. both (b) and (c). Discuss
- 2. For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.
Options- A. fixed
- B. fluidised bed reactor followed by a fixed
- C. fixed bed reactor followed by a fluidised
- D. fluidised Discuss
- 3. For a reaction of the type,
, the rate of reaction (- rx) is given by
Options- A. (K1+K1)CX
- B. (K1+K2+K3)CX
- C. K1CV - K2CX
- D. (K1-K2)CX Discuss
- 4. Which of the following is the most suitable for very high pressure gas phase reaction?
Options- A. Batch reactor
- B. Tubular flow reactor
- C. Stirred tank reactor
- D. Fluidised bed reactor Discuss
- 5. In an exothermic chemical reaction, the reactants compared to the products have
Options- A. higher temperature
- B. more energy
- C. less energy
- D. same energy. Discuss
- 6. BET apparatus
Options- A. measures the catalyst surface area directly.
- B. operates at very high pressure.
- C. is made entirely of stainless steel.
- D. none of these. Discuss
- 7. The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is
Options- A. backmix reactor
- B. plug flow reactor
- C. series of CSTR
- D. PFR in series Discuss
- 8. Pick out the wrong statement.
Options- A. The vessel dispersion number (D/UL) for plug flow and mixed flow approaches zero and infinity respectively.
- B. Space time in a flow reactor is a measure of its capacity and is equal to the residence time when the density of reaction mixture is constant.
- C. Mixed reactor is always smaller than the plug flow reactor for all positive reaction orders for a particular duty.
- D. In an ideal tubular flow reactor, mixing takes place in radial direction and there is no mixing in logitudinal direction. Discuss
- 9. Sulphuric acid is used as a catalyst in the
Options- A. hydrogenation of oils.
- B. gas phase oxidation of SO2 in chamber process.
- C. alkylation of hydrocarbons.
- D. none of these. Discuss
- 10. A reactor is generally termed as an autoclave, when it is a
Options- A. high pressure batch reactor.
- B. atmospheric pressure tank reactor.
- C. high pressure tubular reactor.
- D. atmospheric pressure CSTR. Discuss
Chemical Reaction Engineering problems
Search Results
Correct Answer: both (b) and (c).
Correct Answer: fluidised bed reactor followed by a fixed
Correct Answer: K1CV - K2CX
Correct Answer: Tubular flow reactor
Correct Answer: more energy
Correct Answer: none of these.
Correct Answer: backmix reactor
Correct Answer: Mixed reactor is always smaller than the plug flow reactor for all positive reaction orders for a particular duty.
Correct Answer: alkylation of hydrocarbons.
Correct Answer: high pressure batch reactor.
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