MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Corrosion Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following metal is used as a solid interface for hydrogen gas in the standard hydrogen electrode? |
| A. | Copper |
| B. | Zinc |
| C. | Gold |
| D. | Platinized platinum |
| Answer» E. | |
| 2. |
What is the change in Gibb s free energy of a Cu-Zn system with a cell potential of 1.10V? |
| A. | -11.13 KJ/mol |
| B. | +21.23 KJ/mol |
| C. | +11.13 KJ/mol |
| D. | -21.23 KJ/mol |
| Answer» E. | |
| 3. |
Which of the following formula is used to calculate the Gibbs free energy of an electrochemical reaction? |
| A. | G=-nFE<sup>0</sup><sub>cell</sub> |
| B. | G=+nFE<sup>0</sup><sub>cell</sub> |
| C. | G=-nFE<sub>cell</sub> |
| D. | G=+nFE<sub>cell</sub> |
| Answer» D. G=+nFE<sub>cell</sub> | |
| 4. |
The change in Gibbs free energy is a path function and it is independent of the state of the system. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 5. |
Which of the following is a spontaneous reaction? |
| A. | Production of ammonia |
| B. | Corrosion of metals |
| C. | Photosynthesis reaction |
| D. | Generation of oxygen from water |
| Answer» C. Photosynthesis reaction | |
| 6. |
Which of the following is true, if the transition of a system results in positive Gibbs free energy change? |
| A. | It is a spontaneous reaction |
| B. | Free energy of products is less |
| C. | It is a non-spontaneous reaction |
| D. | Free energy of reactants is more |
| Answer» D. Free energy of reactants is more | |
| 7. |
If the transition of a system from one state to another state resulted in negative free energy change then it is known as a spontaneous reaction. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
What is the direct measure of work capacity or electrical energy available from a system? |
| A. | Change in enthalpy |
| B. | Change in Gibbs free energy |
| C. | Reaction time |
| D. | Concentration of reactants |
| Answer» C. Reaction time | |
| 9. |
Which of the following is/are the applications of modern electrode kinetic principles? |
| A. | Anodic protection |
| B. | Noble metal alloying |
| C. | Methods to measure corrosion rates rapidly |
| D. | Anodic protection, noble metal alloying and methods to measure corrosion rates rapidly |
| Answer» E. | |