MCQOPTIONS
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MCQOPTIONS
This section includes 16 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. |
Poorly oxygenated part becomes cathode whereas well oxygenated part becomes anode in the differential aeration corrosion. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which of the following does not promote the differential aeration corrosion? |
| A. | Accumulation of dirt |
| B. | Partially covering metals |
| C. | Wire fence kind of structures |
| D. | Accumulation of oxygen |
| Answer» E. | |
| 3. |
Concentration cell corrosion occurs when a metallic surface is partially immersed in an electrolyte and partially exposed to air. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Rusting of iron in neutral aqueous solution of electrolyte occurs in the presence of oxygen with the evolution of ___________ |
| A. | Nitrogen |
| B. | Chloride |
| C. | Sulphide |
| D. | Hydrogen |
| Answer» E. | |
| 5. |
Which type of reaction occurs in anodic areas? |
| A. | Oxidation |
| B. | Reduction |
| C. | Displacement |
| D. | Addition |
| Answer» B. Reduction | |
| 6. |
In wet corrosion _________________ are formed at the cathodic areas. |
| A. | Organic compounds |
| B. | Metallic ions |
| C. | Non-metallic ions |
| D. | Inorganic compounds |
| Answer» D. Inorganic compounds | |
| 7. |
WHICH_OF_THE_FOLLOWING_DOES_NOT_PROMOTE_THE_DIFFERENTIAL_AERATION_CORROSION??$ |
| A. | Accumulation of dirt |
| B. | Partially covering metals |
| C. | Wire fence kind of structures |
| D. | Accumulation of oxygen |
| Answer» E. | |
| 8. |
Poorly_oxygenated_part_becomes_cathode_whereas_well_oxygenated_part_becomes_anode_in_the_differential_aeration_corrosion.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Concentration cell corrosion occurs when a metallic surface is partially immersed in an electrolyte and partially exposed to air? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which of the following factor does not contribute to the rusting of iron? |
| A. | Presence of acids and electrolytes |
| B. | Contact with less reactive metal |
| C. | Presence of water and oxygen |
| D. | Contact with more reactive metal |
| Answer» E. | |
| 11. |
Select the incorrect statement about the wet corrosion from the following option. |
| A. | It involves the setting up of large number of galvanic cells |
| B. | It is explained by absorption mechanism |
| C. | It occurs only on heterogeneous metal surface |
| D. | It is a fast process |
| Answer» C. It occurs only on heterogeneous metal surface | |
| 12. |
Which of the following cathodic reaction does not occur due to release of electrons at the anode? |
| A. | Oxygen absorption |
| B. | Hydrogen evolution |
| C. | Electrodialysis |
| D. | Electroplating |
| Answer» D. Electroplating | |
| 13. |
Where does corrosion occurs in the rusting of iron? |
| A. | At cathode |
| B. | At anode |
| C. | In electrolytic solution |
| D. | Outside the solution |
| Answer» C. In electrolytic solution | |
| 14. |
Rusting of iron in neutral aqueous solution of electrolyte occurs in the presence of oxygen with the evolution of |
| A. | Nitrogen |
| B. | Chloride |
| C. | Sulphide |
| D. | Hydrogen |
| Answer» E. | |
| 15. |
Which type of reaction occurs at anodic areas? |
| A. | Oxidation |
| B. | Reduction |
| C. | Displacement |
| D. | Addition |
| Answer» B. Reduction | |
| 16. |
In wet corrosion, _________________ are formed at the cathodic areas. |
| A. | Organic compounds |
| B. | Metallic ions |
| C. | Non-metallic ions |
| D. | Inorganic compounds |
| Answer» D. Inorganic compounds | |