MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A volatile liquid with vapor pressure 85 kPa (at sea level, 25° C) is taken to the peak of Mt. Everest. Which of the following is true? |
| A. | The vapor pressure of the solution decreases |
| B. | The solution will condense quickly than when at sea level |
| C. | The solution will vaporize quickly than when at sea level |
| D. | The vapor pressure of the solution increases |
| Answer» E. | |
| 2. |
Considering a binary solution of components A and B obeys Raoult’s law, which of the following is true? |
| A. | Total vapor pressure cannot be related to mole fraction of only one component |
| B. | Total vapor pressure of one component varies non-linearly with another component |
| C. | A plot of vapor pressures of both components gives a linear plot |
| D. | Total vapor pressure of solution always decreases with increase in mole fraction of a component |
| Answer» D. Total vapor pressure of solution always decreases with increase in mole fraction of a component | |
| 3. |
If ethanol and chloroform are present in a molar ratio of 2:3 then what is the vapor pressure at 20° C if vapor pressures of pure liquids are 5.95 kPa and 21.17 kPa, respectively? |
| A. | 16.692 kPa |
| B. | 15.082 kPa |
| C. | 8.731 kPa |
| D. | 12.038 kPa |
| Answer» C. 8.731 kPa | |
| 4. |
“Total pressure of gas mixture is the sum of individual pressures”. Which law is reflected in this statement? |
| A. | Amagat’s law |
| B. | Raoult’s law |
| C. | Dalton’s law |
| D. | Henry’s law |
| Answer» D. Henry’s law | |
| 5. |
What phenomenon occurs when a solution’s equilibrium vapor pressure equals the surrounding atmospheric pressure? |
| A. | Boiling |
| B. | Melting |
| C. | Condensation |
| D. | Sublimation |
| Answer» B. Melting | |