MCQOPTIONS
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MCQOPTIONS
This section includes 21 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. |
Aluminium and its alloys can be given shapes of pipes, tubes, rods, wires, plates or foils. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Refined bauxite is dissolved in molten cryolite at a temperature slightly below ____________ |
| A. | 00C |
| B. | 1000C |
| C. | 20000C |
| D. | 10000C |
| Answer» E. | |
| 3. |
The molecular formula of cryolite is ____________ |
| A. | Al2O3 |
| B. | Fe2O3 |
| C. | Na3AlF6 |
| D. | Na3MgI6 |
| Answer» D. Na3MgI6 | |
| 4. |
Faraday constant is the amount of electricity present in 100 moles of electrons. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
The unit of ionic mobility in SI system is ____________ |
| A. | msV-1 |
| B. | m3sV2 |
| C. | m2s-1V-1 |
| D. | m2s-1V |
| Answer» D. m2s-1V | |
| 6. |
Silver is electrodeposited on a metallic vessel of surface area 800 cm2 by passing a current of 0.2 A for 3 hours. The thickness of silver deposited is ____________ |
| A. | 0.1 mm |
| B. | 0.02 mm |
| C. | 0.05 mm |
| D. | 0.2 mm |
| Answer» C. 0.05 mm | |
| 7. |
According to Faraday’s second law, the weights of different substances evolved by the passage of the same quantity of electricity are proportional to their _______________ |
| A. | Chemical equivalent weight |
| B. | Current supply |
| C. | Chemical equivalent density |
| D. | Volume |
| Answer» B. Current supply | |
| 8. |
1 Faraday = _______________ |
| A. | 1 coulomb |
| B. | 1000 coulomb |
| C. | 5000 coulomb |
| D. | 96500 coulomb |
| Answer» E. | |
| 9. |
According to Faraday’s first law of electrolysis, the amount of any substance deposited at the electrode is directly proportional to the quantity of _______________ |
| A. | Voltage drop |
| B. | Resistance |
| C. | Electricity passed |
| D. | Tolerance |
| Answer» D. Tolerance | |
| 10. |
THE_MOLECULAR_FORMULA_OF_CRYOLITE_IS?$ |
| A. | Al<sub>2</sub>O<sub>3</sub> |
| B. | Fe<sub>2</sub>O<sub>3</sub> |
| C. | Na<sub>3</sub>AlF<sub>6</sub> |
| D. | Na<sub>3</sub>MgI<sub>6</sub> |
| Answer» D. Na<sub>3</sub>MgI<sub>6</sub> | |
| 11. |
FARADAY_CONSTANT_IS_THE_AMOUNT_OF_ELECTRICITY_PRESENT_IN_100_MOLES_OF_ELECTRONS.?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Aluminium and its alloys can be given shapes of pipes, tubes, rods, wires, plates or foils.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Refined bauxite is dissolved in molten cryolite at a temperature slightly below |
| A. | 0<sup>0</sup>C |
| B. | 100<sup>0</sup>C |
| C. | 2000<sup>0</sup>C |
| D. | 1000<sup>0</sup>C |
| Answer» E. | |
| 14. |
Which of the following factor does not affect ionic mobility? |
| A. | Pressure |
| B. | Nature of ions |
| C. | Temperature |
| D. | Concentration of the solution |
| Answer» B. Nature of ions | |
| 15. |
The unit of ionic mobility in SI system is |
| A. | msV<sup>-1</sup> |
| B. | m<sup>3</sup>sV<sup>2</sup> |
| C. | m<sup>2</sup>s<sup>-1</sup>V<sup>-1</sup> |
| D. | m<sup>2</sup>s<sup>-1</sup>V |
| Answer» D. m<sup>2</sup>s<sup>-1</sup>V | |
| 16. |
The velocity with which an ion moves under a potential gradient of __________ volt/cm in a solution is called ionic mobility. |
| A. | 5 |
| B. | 4 |
| C. | 3 |
| D. | 1 |
| Answer» E. | |
| 17. |
Silver is electrodeposited on a metallic vessel of surface area 800 cm2 by passing a current of 0.2 A for 3 hours. The thickness of silver deposited is |
| A. | 0.1 mm |
| B. | 0.02 mm |
| C. | 0.05 mm |
| D. | 0.2 mm |
| Answer» C. 0.05 mm | |
| 18. |
According to Faraday’s second law, the weights of different substances evolved by the passage of same quantity of electricity are proportional to their$ |
| A. | Chemical equivalent weight |
| B. | Current supply |
| C. | Chemical equivalent density |
| D. | Volume |
| Answer» B. Current supply | |
| 19. |
1 Faraday = |
| A. | 1 coulomb |
| B. | 1000 coulomb |
| C. | 5000 coulomb |
| D. | 96500 coulomb |
| Answer» E. | |
| 20. |
Electrochemical equivalent may be defined as the ____________ of the substance deposited by the passage of 1 coulomb of electricity. |
| A. | Volume |
| B. | Weight |
| C. | Density |
| D. | Velocity |
| Answer» C. Density | |
| 21. |
According to Faraday’s first law of electrolysis, the amount of any substance deposited at the electrode is directly proportional to the quantity of |
| A. | Voltage drop |
| B. | Resistance |
| C. | Electricity passed |
| D. | Tolerance |
| Answer» D. Tolerance | |