MCQOPTIONS
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MCQOPTIONS
This section includes 30 Mcqs, each offering curated multiple-choice questions to sharpen your Applied Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following comes under the wet corrosion? |
| A. | Concentration cell corrosion |
| B. | Oxidation corrosion |
| C. | Liquid metal corrosion |
| D. | Corrosion by other gases |
| Answer» B. Oxidation corrosion | |
| 2. |
Generally electrode potential refers to __________ |
| A. | Reduction potential |
| B. | Oxidation potential |
| C. | Electron potential |
| D. | Cannot be determined |
| Answer» B. Oxidation potential | |
| 3. |
___________is the device used to measure the emf of the cell. |
| A. | Voltmeter |
| B. | Potentiometer |
| C. | Ammeter |
| D. | Multimeter |
| Answer» C. Ammeter | |
| 4. |
The strength of the current is measured in terms of ___________ |
| A. | Coulombs |
| B. | Joules |
| C. | Amperes |
| D. | Ohms |
| Answer» D. Ohms | |
| 5. |
In pickling and etching _________ acids are used. |
| A. | Sulphuric acid |
| B. | Hypo chlorous acid |
| C. | Phosphoric acid |
| D. | Phosphorous acid |
| Answer» B. Hypo chlorous acid | |
| 6. |
The degree of ionisation is given by____________ |
| A. | α = λv * λα |
| B. | α = λv / λα |
| C. | α = λv – λα |
| D. | α = λv + λα |
| Answer» C. α = λv – λα | |
| 7. |
In electrolyte, ionisation ___________ on dilution. |
| A. | Increases |
| B. | Decreases |
| C. | Becomes very small |
| D. | Do not change |
| Answer» B. Decreases | |
| 8. |
The electrolyte is placed in a special type of cell known as____________ |
| A. | Conductivity cell |
| B. | Conductance cell |
| C. | Equivalent cell |
| D. | Conduction cell |
| Answer» C. Equivalent cell | |
| 9. |
In sand blasting, the atmospheric pressure is about __________ |
| A. | 25-100atm |
| B. | 50-100atm |
| C. | 70-100atm |
| D. | 100-250atm |
| Answer» B. 50-100atm | |
| 10. |
The emf of the Weston standard cell is __________ at 20oC. |
| A. | 16.7989V |
| B. | 5.2572V |
| C. | 1.0183V |
| D. | 0V |
| Answer» D. 0V | |
| 11. |
The old paint coating cannot be removed by __________ |
| A. | Soaps |
| B. | Caustic soda |
| C. | Trisodium phosphate |
| D. | Sulphuric acid |
| Answer» E. | |
| 12. |
Mercuric chloride is a strong electrolyte. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
Corrosion is uniform in__________ |
| A. | Dry corrosion |
| B. | Wet corrosion |
| C. | Pitting corrosion |
| D. | Water line corrosion |
| Answer» B. Wet corrosion | |
| 14. |
Corrosion due to the formation of cavities around the metal is called as the___________ |
| A. | Pitting corrosion |
| B. | Soil corrosion |
| C. | Water line corrosion |
| D. | Galvanic corrosion |
| Answer» B. Soil corrosion | |
| 15. |
The energy of the fuel cells ___________ |
| A. | Can be recharged |
| B. | Cannot be recharged |
| C. | Is stored |
| D. | Cannot be said |
| Answer» D. Cannot be said | |
| 16. |
In Daniel cell, the two electrodes are separated by salt bridge. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 17. |
In anodic coatings, the coating metals possess __________ reduction potential than base metal. |
| A. | Higher |
| B. | Lower |
| C. | 0 |
| D. | Cannot be said |
| Answer» C. 0 | |
| 18. |
Chemical action of flowing liquid metal at high temperatures is __________ |
| A. | Liquid metal corrosion |
| B. | Corrosion by other gases |
| C. | Oxidation corrosion |
| D. | Wet corrosion |
| Answer» B. Corrosion by other gases | |
| 19. |
Which of the following is not lost during corrosion? |
| A. | Malleability |
| B. | Ductility |
| C. | Conductivity |
| D. | Colour |
| Answer» D. Colour | |
| 20. |
Decrease in free energy can be given by -ΔG= __________ |
| A. | nFE |
| B. | n/FE |
| C. | nF/E |
| D. | F/nE |
| Answer» B. n/FE | |
| 21. |
The protective coatings are used to ___________ |
| A. | Corrode the metal |
| B. | Prevent from corrosion |
| C. | Increase the corrosion |
| D. | Slightly increase the corrosion |
| Answer» C. Increase the corrosion | |
| 22. |
Corrosion due to the flow of the _________ between the cathodic and anodic areas is called as the electro chemical corrosion by evolution of hydrogen ad absorption of oxygen. |
| A. | Electron current |
| B. | Proton current |
| C. | Ion current |
| D. | Neutron current |
| Answer» B. Proton current | |
| 23. |
The calomel electrode is only used as_________ |
| A. | Oxidising electrode |
| B. | Reducing electrode |
| C. | Depends on the half cell |
| D. | Cannot be said |
| Answer» C. Depends on the half cell | |
| 24. |
In primary cells reaction is not reversible. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 25. |
To detect the flow of current a head telephone ear piece is used instead of__________ |
| A. | Ammeter |
| B. | Galvanometer |
| C. | Multimeter |
| D. | Voltmeter |
| Answer» C. Multimeter | |
| 26. |
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 | |
| 27. |
Corrosion due to difference in water level is__________ |
| A. | Soil corrosion |
| B. | Oxidation corrosion |
| C. | Pitting corrosion |
| D. | Water line corrosion |
| Answer» E. | |
| 28. |
The process of gaining of electrons by metal ions with discharge of metal is called __________ |
| A. | De-electronation |
| B. | Electronation |
| C. | Reduction |
| D. | Cathode |
| Answer» B. Electronation | |
| 29. |
The resistance of the conductor in the electrolytic cell ___________with increase in temperature. |
| A. | Increase |
| B. | Decrease |
| C. | Slightly increase |
| D. | Do no change |
| Answer» C. Slightly increase | |
| 30. |
The process of coating iron or steel sheet with a thin coat of zinc to prevent iron from rusting is called ____________ |
| A. | Tinning |
| B. | Galvanisation |
| C. | Metal cladding |
| D. | Electroplating |
| Answer» C. Metal cladding | |