MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Using which formula is concentration calculated? |
| A. | Falton method |
| B. | Thomson method |
| C. | Robert method |
| D. | Lewis method |
| Answer» B. Thomson method | |
| 2. |
What is the cause of the formation of the depletion layer? |
| A. | Deletion in charge carriers |
| B. | Leakage current |
| C. | Deposition of extra layer on pure metal |
| D. | Extra depletion |
| Answer» D. Extra depletion | |
| 3. |
Where does pure metal gets deposited after passing current? |
| A. | Cathode |
| B. | Anode |
| C. | Electrolyte |
| D. | Negative pole |
| Answer» B. Anode | |
| 4. |
What should be the minimum amount of current that has to be passed to get leakage free metal. |
| A. | 240 A |
| B. | 200 A |
| C. | 350 A |
| D. | 100 A |
| Answer» E. | |
| 5. |
What will happen if the electroplating conditions are exceeded in a system? |
| A. | The process will come to halt |
| B. | Excess metal deposition will take place |
| C. | Electrolyte leakage will take place |
| D. | Impurities will not be removed |
| Answer» B. Excess metal deposition will take place | |
| 6. |
If the pressure of mercury bath is maintained at 30 ATM and the concentration of mercury is 89 g, calculate the temperature at that pressure (given, the gas constant is 8.314 J/mol. K). |
| A. | 660 |
| B. | 456.8 |
| C. | 321.14 |
| D. | 765.09 |
| Answer» D. 765.09 | |
| 7. |
If the temperature of cadmium bath is maintained at 400 K and the concentration of cadmium is 70 g, calculate the pressure at that temperature (given, the gas constant is 8.314 J /mol. K). |
| A. | 49.2 |
| B. | 47.50 |
| C. | 39.40 |
| D. | 0 |
| Answer» C. 39.40 | |
| 8. |
Which of the following is wrong about the working conditions of electroplating? |
| A. | Temperature follows a steady state |
| B. | Pressure follows a steady state |
| C. | Pressure is compressed |
| D. | Pressure is neglected |
| Answer» B. Pressure follows a steady state | |
| 9. |
Identify the correct conditions for electroplating to take place (in K and in ATM). |
| A. | T=200 and P=20 |
| B. | T=300 and P=25 |
| C. | T=100 and P=60 |
| D. | T=110 and P=30 |
| Answer» C. T=100 and P=60 | |