MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following products are formed when a lead storage battery is discharged? |
| A. | SO2 |
| B. | Pb |
| C. | PbO2 |
| D. | PbSO4 |
| Answer» E. | |
| 2. |
Which of the following statements is not true with respect to a lead storage cell (or a lead-acid battery)? |
| A. | The electrolyte used is an aqueous solution of sulphuric acid |
| B. | The anode is made up of lead |
| C. | The cathode is made up of lead(IV) oxide |
| D. | It is a primary cell |
| Answer» E. | |
| 3. |
Which of the following is the voltage output of a mercury cell? |
| A. | 1.55V |
| B. | 1.35V |
| C. | 2.55V |
| D. | 1V |
| Answer» C. 2.55V | |
| 4. |
Which of the following appliances would not use sodium hydroxide as an electrolyte in their mercury cells? |
| A. | Calculators |
| B. | Hearing aids |
| C. | Electronic watches |
| D. | Photographic cameras with a flash |
| Answer» E. | |
| 5. |
What is the final product that zinc forms during the functioning of a mercury cell? |
| A. | ZnO |
| B. | ZnO2 |
| C. | Zn |
| D. | Zn(OH)2 |
| Answer» B. ZnO2 | |
| 6. |
Which of the following scientists invented the first dry cell? |
| A. | Carl Gassner |
| B. | Nikola Tesla |
| C. | Antione Lavoisier |
| D. | Georges Leclanché |
| Answer» B. Nikola Tesla | |
| 7. |
What is the final oxidation state of manganese after the electrochemical reactions in a dry cell? |
| A. | 4 |
| B. | +3 |
| C. | +2 |
| D. | +1 |
| Answer» C. +2 | |
| 8. |
What is the role of manganese dioxide in a dry cell? |
| A. | It acts as an electrolyte |
| B. | It acts as the cathode |
| C. | It acts as an anode |
| D. | It acts as a depolariser |
| Answer» E. | |
| 9. |
Which of the following is the electrolyte used in a dry cell? |
| A. | Ammonium chloride |
| B. | Manganese dioxide |
| C. | Potassium hydroxide |
| D. | Sulphuric acid |
| Answer» B. Manganese dioxide | |
| 10. |
Why do leak proof dry cells have an iron or steel sheet covering the zinc cylinder? |
| A. | It increases the potential difference between the anode and cathode |
| B. | It acts as a barrier around the zinc cylinder which can develop holes during use |
| C. | It makes it waterproof |
| D. | It prevents the leakage of current |
| Answer» C. It makes it waterproof | |
| 11. |
Which of the following is used as an anode in a dry cell? |
| A. | Zinc |
| B. | Graphite |
| C. | Mercury(II) oxide |
| D. | Nickel |
| Answer» D. Nickel | |
| 12. |
Secondary cells are also called storage cells. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Which of the following statements is true regarding a primary cell? |
| A. | The electrode reactions can be reversed |
| B. | It can be recharged |
| C. | An example of a primary cell is a mercury cell |
| D. | An example of a primary cell is a nickel-cadmium storage cell |
| Answer» D. An example of a primary cell is a nickel-cadmium storage cell | |
| 14. |
Which of the following is not a requirement for a useful battery? |
| A. | It should be light and compact |
| B. | It should have a reasonable life span |
| C. | It should ideally have a constant voltage throughout its lifespan |
| D. | It should supply Alternating Current(AC) |
| Answer» E. | |
| 15. |
A battery is an arrangement of electrolytic cells. |
| A. | True |
| B. | False |
| Answer» C. | |