MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
The thickness of the protective film in passivation is about ____________ |
| A. | 1 mm |
| B. | 0.02 mm |
| C. | 0.0004 mm |
| D. | 0.004 mm |
| Answer» D. 0.004 mm | |
| 2. |
The phenomenon by which a metal or alloy show high corrosion resistance due to the formation of the highly protective film is called ____________ |
| A. | Electrolysis |
| B. | Electrodialysis |
| C. | Galvanisation |
| D. | Passivation |
| Answer» E. | |
| 3. |
The galvanic series predicts the relative displacement tendencies of metals and non-metals in electrolytes containing a particular concentration of salts. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
As the distance between the two metals increases in the galvanic series, the degree of corrosion ____________ |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | First increases then decreases |
| Answer» B. Decreases | |
| 5. |
Which of the following is the least noble metal? |
| A. | Magnesium |
| B. | Brass |
| C. | Aluminium |
| D. | Nickel |
| Answer» B. Brass | |
| 6. |
Galvanic series gives real and useful information regarding the ____________ |
| A. | Electrical conductivity of metals and alloys |
| B. | Thermal conductivity of metals and alloys |
| C. | Corrosion behaviour of metals and alloys |
| D. | Oxidation power of metals and alloys |
| Answer» D. Oxidation power of metals and alloys | |
| 7. |
THE_THICKNESS_OF_THE_PROTECTIVE_FILM_IN_PASSIVATION_IS_ABOUT?$ |
| A. | 1 mm |
| B. | 0.02 mm |
| C. | 0.0004 mm |
| D. | 0.004 mm |
| Answer» D. 0.004 mm | |
| 8. |
The phenomenon by which a metal or alloy show high corrosion resistance due to the formation of the highly protective film is calle? |
| A. | Electrolysis |
| B. | Electrodialysis |
| C. | Galvanisation |
| D. | Passivation |
| Answer» E. | |
| 9. |
The galvanic series predicts the relative displacement tendencies of metals and non-metals in electrolytes containing a particular concentration of salts? |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Which electrode is used for measuring electrode potential as a standard electrode in galvanic series? |
| A. | Hydrogen electrode |
| B. | Calomel electrode |
| C. | Oxygen electrode |
| D. | Nitrogen electrode |
| Answer» C. Oxygen electrode | |
| 11. |
Which of the following metals are protected metals? |
| A. | Present at the top |
| B. | Present at the middle |
| C. | Present at the bottom |
| D. | Both present at the top and the bottom |
| Answer» D. Both present at the top and the bottom | |
| 12. |
As the distance between the two metals increases in the galvanic series, the degree of corrosion |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | First increases then decreases |
| Answer» B. Decreases | |
| 13. |
Arrange the following in the ascending order of their degree of corrosion. |
| A. | Zinc >> Magnesium >> Copper >> Lead >> Aluminium |
| B. | Copper >> Lead >> Aluminium >> Zinc >> Magnesium |
| C. | Zinc >> Magnesium >> Lead >> Copper >> Aluminium |
| D. | Copper >> Aluminium >> Zinc >> Lead >> Magnesium |
| Answer» C. Zinc >> Magnesium >> Lead >> Copper >> Aluminium | |
| 14. |
Which of the following is the most noble metal? |
| A. | Gold |
| B. | Graphite |
| C. | Titanium |
| D. | Platinum |
| Answer» E. | |
| 15. |
Galvanic series gives real and useful information regarding the |
| A. | Electrical conductivity of metals and alloys |
| B. | Thermal conductivity of metals and alloys |
| C. | Corrosion behaviour of metals and alloys |
| D. | Oxidation power of metals and alloys |
| Answer» D. Oxidation power of metals and alloys | |