MCQOPTIONS
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MCQOPTIONS
This section includes 9 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 metal does not corrode? |
| A. | Iron |
| B. | Zinc |
| C. | Copper |
| D. | Magnesium |
| Answer» D. Magnesium | |
| 2. |
Which of the following is the overall reaction of rusting? |
| A. | 2Fe<sub>(s)</sub> 2Fe<sup>2+</sup> + 4e<sup> </sup> |
| B. | O<sub>2</sub> (g)+4H<sup>+</sup>(aq)+4e<sup> </sup> 2H<sub>2</sub>O(l) |
| C. | 2Fe<sub>(s)</sub> + O<sub>2</sub><sub>(g)</sub> + 4H<sup>+</sup><sub>(aq)</sub> 2Fe<sup>2+</sup><sub>(aq)</sub> + 2H<sub>2</sub>O<sub>(l)</sub> |
| D. | H<sub>2</sub>O H<sup>+</sup> + OH<sup> </sup> |
| Answer» D. H<sub>2</sub>O H<sup>+</sup> + OH<sup> </sup> | |
| 3. |
Which of the following is not essential for rusting to take place? |
| A. | Metal (like iron) |
| B. | Oxygen |
| C. | Moisture |
| D. | Light |
| Answer» E. | |
| 4. |
Which of the following is not a method of prevention of corrosion? |
| A. | Galvanization |
| B. | Anti-rust solutions |
| C. | Cathodic protection |
| D. | Heating |
| Answer» E. | |
| 5. |
Which of the following does not cause rusting of iron? |
| A. | Moisture |
| B. | Vacuum |
| C. | SO<sub>2</sub> |
| D. | CO<sub>2</sub> |
| Answer» C. SO<sub>2</sub> | |
| 6. |
Magnesium is used as a sacrificial metal to protect iron from rust. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
Which of the following statements regarding corrosion is true? |
| A. | Corrosion does not depend on the reactivity of the metal |
| B. | Presence of impurities does not affect the rate of corrosion |
| C. | Strains in metals affect the rate of corrosion |
| D. | Presence of electrolytes does not affect the rate of corrosion |
| Answer» D. Presence of electrolytes does not affect the rate of corrosion | |
| 8. |
What is the method of protection of iron by coating it with zinc called? |
| A. | Tinning |
| B. | Cathodic protection |
| C. | Galvanization |
| D. | Anti-rust solutions |
| Answer» D. Anti-rust solutions | |
| 9. |
Rusting of iron is a type of corrosion. |
| A. | True |
| B. | False |
| Answer» B. False | |