MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Applied Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The emf of the anode in zinc-air batteries is ___________ |
| A. | -1V |
| B. | -1.25V |
| C. | 1V |
| D. | 1.25V |
| Answer» C. 1V | |
| 2. |
The drawback of this battery is the working voltage of battery is _________ due to the internal losses. |
| A. | Higher |
| B. | Lower |
| C. | Moderate |
| D. | Not considerable |
| Answer» C. Moderate | |
| 3. |
In zinc-air cells are composed of three parts of zinc used as ___________ |
| A. | Anode |
| B. | Cathode |
| C. | Based on the half cell |
| D. | Can’t be said |
| Answer» B. Cathode | |
| 4. |
The advantages of the nickel metal hydrated batteries are having _________ more energy than the nickel cadmium batteries. |
| A. | 100% |
| B. | 50% |
| C. | 75% |
| D. | 25% |
| Answer» D. 25% | |
| 5. |
Which of the following is not lost during corrosion? |
| A. | Malleability |
| B. | Ductility |
| C. | Conductivity |
| D. | Colour |
| Answer» E. | |
| 6. |
Corrosion is occur due to mixture of iron and _______ . |
| A. | Sulfur |
| B. | Hydrogen |
| C. | Nitrogen |
| D. | Oxygen |
| Answer» E. | |
| 7. |
IN_ZINC-AIR_CELLS_ARE_COMPOSED_OF_THREE_PARTS_OF_ZINC_USED_AS____________?$ |
| A. | Anode |
| B. | Cathode |
| C. | Based on the half cell |
| D. | Can’t be said |
| Answer» B. Cathode | |
| 8. |
The emf of the anode in zinc-air batteries is ___________$ |
| A. | -1V |
| B. | -1.25V |
| C. | 1V |
| D. | 1.25V |
| Answer» C. 1V | |
| 9. |
The_drawback_of_this_battery_is_the_working_voltage_of_battery_is___________due_to_the_internal_losses.$ |
| A. | Higher |
| B. | Lower |
| C. | Moderate |
| D. | Not considerable |
| Answer» C. Moderate | |
| 10. |
The emf of the cathode in the zinc-air batteries is __________ |
| A. | 0.1V |
| B. | 0.2V |
| C. | 0.3V |
| D. | 0.4V |
| Answer» E. | |
| 11. |
The advantages of the nickel metal hydrated batteries are having _________ more energy than the nickel cadmium batteries? |
| A. | 100% |
| B. | 50% |
| C. | 75% |
| D. | 25% |
| Answer» D. 25% | |
| 12. |
Nickel metal hydrated batteries having the low cell voltage of __________ |
| A. | 1V |
| B. | 1.2V |
| C. | 1.3V |
| D. | 1.4V |
| Answer» C. 1.3V | |
| 13. |
The amount of iron wasted by corrosion each year is estimated about _________ of its annual production. |
| A. | 1 |
| B. | 1/2 |
| C. | 1/4 |
| D. | 1/8 |
| Answer» D. 1/8 | |
| 14. |
The corrosion is the reverse process of ____________ |
| A. | Metal extraction |
| B. | Metal production |
| C. | Metal heating |
| D. | Metal moulding |
| Answer» B. Metal production | |
| 15. |
Iron undergoes corrosion to produce __________ coloured hydrated ferric oxide. |
| A. | Red |
| B. | Brown |
| C. | Green |
| D. | Blue |
| Answer» C. Green | |
| 16. |
The metals except ________ exist in nature in the form of their minerals or ores. |
| A. | Gold |
| B. | Silver |
| C. | Copper |
| D. | Iron |
| Answer» B. Silver | |
| 17. |
In corrosion, as a result of decay, the metals are not converted into __________ |
| A. | Oxides |
| B. | Hydroxides |
| C. | Carbonates |
| D. | Peroxides |
| Answer» E. | |