MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
What is the melting point of mercury? |
| A. | 357<sup>0</sup>C |
| B. | -39<sup>0</sup>C |
| C. | 0<sup>0</sup>C |
| D. | 100<sup>0</sup>C |
| Answer» C. 0<sup>0</sup>C | |
| 2. |
What is the molar heat of fusion (kJ/mol) of water? |
| A. | 1.3 |
| B. | 0.84 |
| C. | 7.61 |
| D. | 6.01 |
| Answer» E. | |
| 3. |
The temperature remains constant during phase change because the increased kinetic energy is used to overcome the cohesive forces in the liquid. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Molar heat of fusion is defined as ____________ |
| A. | Energy required to melt one gram of solid |
| B. | Energy required to melt one mole of solid |
| C. | Energy required to melt one kilogram of solid |
| D. | Energy required to melt ten moles of solid |
| Answer» C. Energy required to melt one kilogram of solid | |
| 5. |
The melting point of ice is ____________ |
| A. | 0<sup>0</sup>C |
| B. | 100<sup>0</sup>C |
| C. | 4<sup>0</sup>C |
| D. | -4<sup>0</sup>C |
| Answer» B. 100<sup>0</sup>C | |
| 6. |
When the solid and liquid phase are in equilibrium, the temperature ____________ |
| A. | Increases gradually |
| B. | Decreases gradually |
| C. | Remains constant |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 7. |
The temperature at which solid and liquid coexist in equilibrium is called ____________ |
| A. | Melting point of liquid |
| B. | Freezing point of liquid |
| C. | Freezing point of solid |
| D. | All of the mentioned |
| Answer» C. Freezing point of solid | |
| 8. |
The purity of the compound is confirmed by ____________ |
| A. | Its melting point and boiling point |
| B. | Chromatographic technique |
| C. | Spectroscopy |
| D. | All of the mentioned |
| Answer» E. | |