MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The minimum energy required by the reactants to effect the product formation is termed as _____ |
| A. | Threshold energy |
| B. | Potential energy |
| C. | Activation energy |
| D. | Kinetic energy |
| Answer» B. Potential energy | |
| 2. |
Which of the following is incorrect about Transition state theory? |
| A. | It is based on statistical mechanics |
| B. | The formation of activated complex to be rapid |
| C. | The decomposition of activated complex is slow |
| D. | The formation of activated complex is the rate determining step |
| Answer» E. | |
| 3. |
If kB is Boltzmann constant and h is Plank’s constant, the rate of decomposition of complex formed during product formation, as given by Transition state theory is ____ |
| A. | \(\frac{k_B T}{h} \) |
| B. | \(\frac{k_B h}{T} \) |
| C. | \(\frac{k_B T}{2h} \) |
| D. | \(\frac{k_B T^2}{h} \) |
| Answer» B. \(\frac{k_B h}{T} \) | |
| 4. |
State true or false.Transition state theory postulates that the reacting molecules form unstable intermediates, which are subsequently decomposed to products. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
The temperature dependency of rate constant as given by Transition state theory is ____ |
| A. | k α T |
| B. | k α T2 |
| C. | k α T3 |
| D. | k α T0.5 |
| Answer» B. k α T2 | |
| 6. |
State true or false.Transition state theory shows that there exists no equilibrium between activated complex and reacting molecules at all times. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
The temperature dependency of rate constant as given by Collision theory is ____ |
| A. | k α T |
| B. | k α T2 |
| C. | k α T3 |
| D. | k α T0.5 |
| Answer» E. | |
| 8. |
Collision theory states that ____ |
| A. | Molecules do not collide during the reaction |
| B. | Reactant molecules collide to effect product formation |
| C. | Reactants form complexes |
| D. | Products formed are unstable |
| Answer» C. Reactants form complexes | |
| 9. |
For an endothermic reaction, the average energy of products is ____ |
| A. | Equal to the average energy of reactants |
| B. | Lower than or equal to the average energy of reactants |
| C. | Lower than the average energy of reactants |
| D. | Greater than the average energy of reactants |
| Answer» E. | |
| 10. |
The equation representing the variation of rate constant with respect to temperature by Arrhenius equation is ____ |
| A. | ln(\(\frac{k_2}{k_1}\)) = –\(\frac{E}{R} (\frac{1}{T_2} – \frac{1}{T_1}) \) |
| B. | ln(\(\frac{k_2}{k_1}\)) = \(\frac{E}{R} (\frac{1}{T_2} – \frac{1}{T_1}) \) |
| C. | ln(\(\frac{k_2}{k_1}\)) = –\(\frac{E}{R} (\frac{1}{T_1}- \frac{1}{T_2}) \) |
| D. | ln(\(\frac{k_2}{k_1}\)) = –\(\frac{E}{R} (\frac{1}{T_2} + \frac{1}{T_1}) \) |
| Answer» B. ln(\(\frac{k_2}{k_1}\)) = \(\frac{E}{R} (\frac{1}{T_2} – \frac{1}{T_1}) \) | |