MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The emf of the Weston standard cell is __________ at 20oC. |
| A. | 16.7989V |
| B. | 5.2572V |
| C. | 1.0183V |
| D. | 0V |
| Answer» D. 0V | |
| 2. |
___________ is the device used to measure the emf of the cell. |
| A. | Voltmeter |
| B. | Potentiometer |
| C. | Ammeter |
| D. | Multimeter |
| Answer» C. Ammeter | |
| 3. |
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 | |
| 4. |
For 1N KCL standard reduction potential in the calomel electrode is __________ |
| A. | 0.28V |
| B. | 0.25V |
| C. | 0.5V |
| D. | 1V |
| Answer» B. 0.25V | |
| 5. |
In standard calomel electrode, for saturated KCL solution, electrode potential is __________ |
| A. | 0.897V |
| B. | 0.456V |
| C. | 0.3512V |
| D. | 0.2415V |
| Answer» E. | |
| 6. |
If the standard hydrogen electrode is used as the reduction electrode, then the emf is given by __________ |
| A. | E<sub>red</sub> = -E<sup>o</sup> + (5/n) log<sub>10</sub> [H<sup>+</sup>] |
| B. | E<sub>red</sub> = -E<sup>o</sup> (0.0591/n) log<sub>10</sub> [H<sup>+</sup>] |
| C. | E<sub>red</sub> = E<sup>o</sup> + (0.0591/n) log<sub>10</sub> [H<sup>+</sup>] |
| D. | E<sub>red</sub> = -E<sup>o</sup> + (0.0591/n) log<sub>10</sub> [H<sup>+</sup>] |
| Answer» E. | |
| 7. |
In standard hydrogen electrode, concentration of hydrogen is ____________ |
| A. | 0M |
| B. | 0.5M |
| C. | 1M |
| D. | 1.5M |
| Answer» D. 1.5M | |