MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In a constant volume gas thermometer, the pressure of liquid, at a temperature of 27 C, being measured corresponds to 50cm of mercury. If the temperature increases by 20K, find the pressure. |
| A. | 53.33cm |
| B. | 87.03cm |
| C. | 65.33cm |
| D. | 97.03cm |
| Answer» B. 87.03cm | |
| 2. |
What is the value of gas constant? |
| A. | 8.314 kJ mol<sup>-1</sup>K<sup>-1</sup> |
| B. | 8.314 L atm mol<sup>-1</sup>K<sup>-1</sup> |
| C. | 0.0821 L atm mol<sup>-1</sup>K<sup>-1</sup> |
| D. | It is equal to the constant in PV/T = constant |
| Answer» D. It is equal to the constant in PV/T = constant | |
| 3. |
What is considered as zero point on the Kelvin scale? |
| A. | -273.15K |
| B. | -273.15 C |
| C. | 0 C |
| D. | -273.15 C |
| Answer» C. 0 C | |
| 4. |
What is absolute zero? |
| A. | It is the minimum temperature that has been achieved |
| B. | It is the lowest temperature of air |
| C. | It is -273K |
| D. | It is the temperature at which an ideal gas will have zero pressure, assuming it stays a gas |
| Answer» E. | |
| 5. |
For a constant volume gas thermometer select the correct statement. |
| A. | It doesn t use mercury for pressure measurement |
| B. | We actually measure the pressure at constant volume and the scale is calibrated to give the temperature reading |
| C. | Any high density gas can be used |
| D. | Pressure Temp<sup>2</sup> |
| Answer» C. Any high density gas can be used | |
| 6. |
Why can any low density gas be used in a constant volume gas thermometer? |
| A. | All low density gases show the same expansion behaviour |
| B. | They are easy to handle |
| C. | Their pressure variation is proportional to square of the change in temperature |
| D. | The given statement is not true |
| Answer» B. They are easy to handle | |
| 7. |
Boyle s law and Charle s law together form which law? |
| A. | PV/T = constant |
| B. | PV<sup>2</sup>/T = constant |
| C. | PV = constant |
| D. | V/T = constant |
| Answer» B. PV<sup>2</sup>/T = constant | |
| 8. |
Boyle s and Charle s law are obeyed by low density gases only. True or False? |
| A. | True |
| B. | False |
| Answer» B. False | |