MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
The activity of a catalyst at a time t = 0 is ____ |
| A. | Negative |
| B. | Zero |
| C. | Unity |
| D. | |
| Answer» D. | |
| 2. |
If the rate of deactivation is given by ( frac{da}{dt} ) = 0.0064 day-1, the expression relating activity and time is ___ |
| A. | a = 0.0064t |
| B. | a = 1-0.0064t |
| C. | a = t |
| D. | a = 0.0064-t |
| Answer» C. a = t | |
| 3. |
The slope of the curve of ln ((ln frac{C_A}{C_{A }}) ) and t for batch solid fluid independent deactivation system is ___ |
| A. | ln(lnk<sub>d</sub>) |
| B. | ln(k<sub>d</sub>) |
| C. | k<sub>d</sub> |
| D. | -k<sub>d</sub> |
| Answer» E. | |
| 4. |
The rate expression for independent deactivation for batch solids is ____ |
| A. | ln ((ln frac{C_A}{C_{A }}) ) = ln ( frac{Wk }{Vk_d} ) k<sub>d</sub>t |
| B. | ln ( frac{C_A}{C_{A }} ) = ln ( frac{Wk }{Vk_d} ) k<sub>d</sub>t |
| C. | lnln ( frac{C_A}{C_{A }} ) = ln ( frac{Wk }{Vk_d} ) |
| D. | lnln ( frac{C_A}{C_{A }} ) = ( frac{Wk }{Vk_d} ) k<sub>d</sub>t |
| Answer» B. ln ( frac{C_A}{C_{A }} ) = ln ( frac{Wk }{Vk_d} ) k<sub>d</sub>t | |
| 5. |
Which of the following reactor arrangements causes fast deactivation? |
| A. | Mixed flow for fluid |
| B. | Plug flow for fluid |
| C. | Fluidised bed reactor |
| D. | Batch for fluid and solid |
| Answer» D. Batch for fluid and solid | |
| 6. |
The activity of a catalyst pellet is defined as the ratio of ___ |
| A. | Rate of adsorption of reactants to the catalyst surface to the rate at which the catalytic pellet converts the reactant |
| B. | Rate at which the catalytic pellet converts the reactant to the rate of adsorption of reactants to the catalyst surface |
| C. | Rate at which the catalytic pellet converts the reactant to the rate of reaction with a fresh pellet |
| D. | The rate of reaction with a fresh pellet to the rate at which the catalytic pellet converts the reactant |
| Answer» D. The rate of reaction with a fresh pellet to the rate at which the catalytic pellet converts the reactant | |
| 7. |
Which of the following represents series type deactivation model? (Where R is the product and P is the poison) |
| A. | A R P |
| B. | A P |
| C. | A R + P |
| D. | A R, A P |
| Answer» B. A P | |
| 8. |
The catalyst deactivation caused by deposition on surface and pores of catalyst is called ____ |
| A. | Adsorption |
| B. | Regeneration |
| C. | Fouling |
| D. | Desorption |
| Answer» D. Desorption | |
| 9. |
State true or false.In parallel deactivation, the reactant produces a side product which deposits on the catalytic surface and deactivates it. |
| A. | True |
| B. | False |
| Answer» B. False | |