MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What are the factors that determine an effective collision? |
| A. | Translational collision and energy of activation |
| B. | Threshold energy and proper orientation |
| C. | Proper orientation and steric bulk of the molecule |
| D. | Collision frequency, threshold energy and proper orientation |
| Answer» E. | |
| 2. |
In a chemical reaction, if the reactant requires a high amount of activation energy, then what is the behaviour of the reaction? |
| A. | Fast |
| B. | Slow |
| C. | Instantaneous |
| D. | Doesn t depend on activation energy |
| Answer» C. Instantaneous | |
| 3. |
What is the rate of reaction for a bimolecular elementary reaction? |
| A. | Z<sub>AB</sub> e<sup>-E<sub>a</sub>/RT</sup> |
| B. | Z<sub>AB</sub> e<sup>E<sub>a</sub>/RT</sup> |
| C. | Z<sub>AB</sub> e<sup>-E<sub>a</sub>/RT</sup> |
| D. | Z<sub>AB</sub> e<sup>E<sub>a</sub>/RT</sup> |
| Answer» B. Z<sub>AB</sub> e<sup>E<sub>a</sub>/RT</sup> | |
| 4. |
What is the term used to refer to the number of collisions per unit volume of the reaction mixture? |
| A. | Collision force |
| B. | Collision frequency |
| C. | Collision energy |
| D. | Collision time period |
| Answer» C. Collision energy | |
| 5. |
Which of the following is a drawback of collision theory? |
| A. | Proper orientation |
| B. | High activation energy |
| C. | Hard spheres |
| D. | Have energy equal to or greater than the threshold energy |
| Answer» D. Have energy equal to or greater than the threshold energy | |
| 6. |
The proper orientation of reactant molecules leads to bond formation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
Who put forward the collision theory of chemical reactions? |
| A. | Trautz and Lewis |
| B. | Luigi Galvani |
| C. | Henry Cavendish |
| D. | Alessandro Volta |
| Answer» B. Luigi Galvani | |
| 8. |
Effective collisions are those in which molecules must acquire the energy of activation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Which of the following explains the increase in the reaction rate by a catalyst? |
| A. | Catalyst decreases the rate of backward reaction so that rate of forward reaction increases |
| B. | Catalyst provides extra energy to reacting molecules so that they produce effective collisions |
| C. | Catalyst provides an alternative path of lower activation energy to the reactants |
| D. | Catalyst increases the number of collisions between the reacting molecules. |
| Answer» D. Catalyst increases the number of collisions between the reacting molecules. | |
| 10. |
When a catalyst is involved in the collision between the reactant molecules, more energy is required. |
| A. | True |
| B. | False |
| Answer» C. | |