MCQOPTIONS
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MCQOPTIONS
This section includes 33 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 strength of the current is measured in terms of ___________ |
| A. | Coulombs |
| B. | Joules |
| C. | Amperes |
| D. | Ohms |
| Answer» D. Ohms | |
| 2. |
Electrolytes obey __________ to the some extent as metallic conductors. |
| A. | Specific conductance |
| B. | Ohms law |
| C. | Molecular conductance |
| D. | Equivalent conductance |
| Answer» C. Molecular conductance | |
| 3. |
Generally electrode potential refers to __________ |
| A. | Reduction potential |
| B. | Oxidation potential |
| C. | Electron potential |
| D. | Cannot be determined |
| Answer» B. Oxidation potential | |
| 4. |
Decrease in free energy can be given by -ΔG = __________ |
| A. | nFE |
| B. | n/FE |
| C. | nF/E |
| D. | F/nE |
| Answer» B. n/FE | |
| 5. |
In Daniel cell, the two electrodes are separated by salt bridge. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Electronation is also called as ___________ electrode. |
| A. | Oxidation |
| B. | Reduction |
| C. | Electrifying |
| D. | Electro chemical cell |
| Answer» C. Electrifying | |
| 7. |
The process of gaining of electrons by metal ions with a discharge of metal is called __________ |
| A. | De-electronation |
| B. | Electronation |
| C. | Reduction |
| D. | Cathode |
| Answer» B. Electronation | |
| 8. |
Hydrogen-oxygen fuel cell can produce drinking water of potable quality. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
The residual product discharged by the hydrogen-oxygen cell is ____________ |
| A. | Hydrogen peroxide |
| B. | Alcohol |
| C. | Water |
| D. | Potassium permanganate |
| Answer» D. Potassium permanganate | |
| 10. |
The standard emf of the hydrogen-oxygen fuel cell is ____________ |
| A. | 1.23 V |
| B. | 2.54 V |
| C. | 3.96 V |
| D. | 0.58 V |
| Answer» B. 2.54 V | |
| 11. |
The electrolytic solution used in a hydrogen-oxygen fuel cell is ____________ |
| A. | 75% KOH solution |
| B. | 25% KOH solution |
| C. | 75% NaOH solution |
| D. | 25% NaOH solution |
| Answer» C. 75% NaOH solution | |
| 12. |
A fuel cell is used to convert chemical energy into ____________ |
| A. | Mechanical energy |
| B. | Solar energy |
| C. | Electrical energy |
| D. | Potential energy |
| Answer» D. Potential energy | |
| 13. |
DECREASE_IN_FREE_ENERGY_CAN_BE_GIVEN_BY_-‚ÂÀ√≠‚ÀÖ√ÜG=___________?$# |
| A. | nFE |
| B. | n/FE |
| C. | nF/E |
| D. | F/nE |
| Answer» B. n/FE | |
| 14. |
THE_RESIDUAL_PRODUCT_DISCHARGED_BY_THE_HYDROGEN-OXYGEN_CELL_IS?$ |
| A. | Hydrogen peroxide |
| B. | Alcohol |
| C. | Water |
| D. | Potassium permanganate |
| Answer» D. Potassium permanganate | |
| 15. |
Electrolytes obey __________ to the some extent as metallic conductors.$ |
| A. | Specific conductance |
| B. | Ohms law |
| C. | Molecular conductance |
| D. | Equivalent conductance |
| Answer» C. Molecular conductance | |
| 16. |
Generally_electrode_potential_refers_to___________$ |
| A. | Reduction potential |
| B. | Oxidation potential |
| C. | Electron potential |
| D. | Cannot be determined |
| Answer» B. Oxidation potential | |
| 17. |
Hydrogen-oxygen_fuel_cell_can_produce_drinking_water_of_potable_quality.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 18. |
The quantity of current passing through a conductor is expressed in terms of __________ |
| A. | Joules |
| B. | Coulombs |
| C. | Amperes |
| D. | Ohms |
| Answer» C. Amperes | |
| 19. |
The strength of the current is measured in terms of ___________ |
| A. | Coulombs |
| B. | Joules |
| C. | Amperes |
| D. | Ohms |
| Answer» D. Ohms | |
| 20. |
In Daniel cell, the two electrodes are separated by salt bridge? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
The standard emf of the hydrogen-oxygen fuel cell i? |
| A. | 1.23 V |
| B. | 2.54 V |
| C. | 3.96 V |
| D. | 0.58 V |
| Answer» B. 2.54 V | |
| 22. |
The movement of electrons in Daniel cell is from _________ to _________ |
| A. | Zn to Cu |
| B. | Cu to Zn |
| C. | Zn to Ca |
| D. | Ca to Zn |
| Answer» B. Cu to Zn | |
| 23. |
The electrolytic solution used in a hydrogen-oxygen fuel cell is |
| A. | 75% KOH solution |
| B. | 25% KOH solution |
| C. | 75% NaOH solution |
| D. | 25% NaOH solution |
| Answer» C. 75% NaOH solution | |
| 24. |
Electronation is also called as ___________electrode. |
| A. | Oxidation |
| B. | Reduction |
| C. | Electrifying |
| D. | Electro chemical cell |
| Answer» C. Electrifying | |
| 25. |
Which of the following is not an example of a fuel cell? |
| A. | Hydrogen-oxygen cell |
| B. | Methyl-oxygen-alcohol cell |
| C. | Propane-oxygen cell |
| D. | Hexanone-oxygen cell |
| Answer» E. | |
| 26. |
Which of the following is the correct reaction at anode? |
| A. | Zn→Zn<sup>+2</sup> + 2e<sup>–</sup> |
| B. | Zn→Zn<sup>+</sup> + e<sup>–</sup> |
| C. | Cu<sup>+2</sup>+ 2e<sup>–</sup> → Cu |
| D. | Cu<sup>++</sup> e<sup>–</sup> → Cu |
| Answer» B. Zn‚Äö√Ñ√∂‚àö√∫‚àö‚â†Zn<sup>+</sup> + e<sup>‚Äö√Ñ√∂‚àö√ë‚àö¬®</sup> | |
| 27. |
A stable interface between solid _________ liquid ____________ and gaseous ___________ promotes high rate of electrode processes. |
| A. | Fuel, electrolyte, electrode |
| B. | Electrode, fuel, electrolyte |
| C. | Electrode, electrolyte, fuel |
| D. | Fuel, electrode, electrolyte |
| Answer» D. Fuel, electrode, electrolyte | |
| 28. |
According to the convention, the Daniel cell is represented as ________ |
| A. | Zn l ZnSO<sub>4</sub> ll CuSO<sub>4</sub> l Cu, E = 1.09 volt |
| B. | Zn l ZnSO<sub>4</sub> ll Cu l CuSO<sub>4</sub> , E = 1.09 volt |
| C. | ZnSO<sub>4</sub> l Zn ll CuSO<sub>4</sub> l Cu, E = 1.09 volt |
| D. | Zn l ZnS ll CuSO<sub>4</sub> l Cu, E = 1.09 volt |
| Answer» B. Zn l ZnSO<sub>4</sub> ll Cu l CuSO<sub>4</sub> , E = 1.09 volt | |
| 29. |
Fuel cells are free from vibrations, heat transfer and thermal pollution. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 30. |
The e.m.f of Daniel cell is __________ |
| A. | 1.02V |
| B. | 1.00V |
| C. | 1.09V |
| D. | 2V |
| Answer» D. 2V | |
| 31. |
______________ and suitable catalyst are required to promote high rate of electrode processes. |
| A. | Lower temperature |
| B. | Higher temperature |
| C. | Moderate temperature |
| D. | Very low temperature |
| Answer» C. Moderate temperature | |
| 32. |
The anode of the galvanic cell has __________ |
| A. | Positive polarity |
| B. | Negative polarity |
| C. | No polarity |
| D. | Neutral |
| Answer» C. No polarity | |
| 33. |
A fuel cell is used to convert chemical energy into |
| A. | Mechanical energy |
| B. | Solar energy |
| C. | Electrical energy |
| D. | Potential energy |
| Answer» D. Potential energy | |