MCQOPTIONS
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MCQOPTIONS
This section includes 10 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 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 T |
| B. | k T<sup>2</sup> |
| C. | k T<sup>3</sup> |
| D. | k T<sup>0.5</sup> |
| Answer» B. k T<sup>2</sup> | |
| 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 T |
| B. | k T<sup>2</sup> |
| C. | k T<sup>3</sup> |
| D. | k T<sup>0.5</sup> |
| 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}) ) | |