MCQOPTIONS
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MCQOPTIONS
This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
We have a jar filled with gas characterised by parameters P, V and T and another jar B filled with a gas with parameters 2P, V/4,2T; where the symbols have their usual meanings. The ratio of the number of molecules of jar A to those of jar B is? |
| A. | 1:1 |
| B. | 1:2 |
| C. | 2:1 |
| D. | 4:1 |
| Answer» E. | |
| 2. |
The temperature of H2 at which the rms velocity of its molecules is seven times the rms velocity of the molecules of nitrogen at 300K is? |
| A. | 2100K |
| B. | 1700K |
| C. | 1350K |
| D. | 1050K |
| Answer» E. | |
| 3. |
Average velocity of a gas becomes 4 times. What will be the effect on rms velocity at the same temperature? |
| A. | 1.4 times |
| B. | 4 times |
| C. | 3 times |
| D. | 2 times |
| Answer» C. 3 times | |
| 4. |
If an ideal gas has a volume V at 27°C and it is heated at a constant pressure, so that its volume becomes 1.5V, then the value of final temperature is? |
| A. | 327K |
| B. | 177°C |
| C. | 873K |
| D. | 600°C |
| Answer» C. 873K | |
| 5. |
If a given mass of gas occupies a volume of 10cc at 1 atmospheric pressure and temperature 100°C, what will be its volume at 4 atmospheric pressure, the temperature being the same? |
| A. | 100cc |
| B. | 400cc |
| C. | 104cc |
| D. | 2.5cc |
| Answer» E. | |
| 6. |
R/Cv =0.67 for a gas. Then this gas is made up of which molecules? |
| A. | Diatomic |
| B. | Mixture of diatomic and polyatomic |
| C. | Monoatomic |
| D. | Polyatomic |
| Answer» D. Polyatomic | |
| 7. |
Assertion: Air pressure in a car tyre increases during driving.Reason: Absolute zero temperature is not zero energy temperature. |
| A. | Both assertion and reason are true and the reason is the correct explanation of the assertion |
| B. | Both assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | Assertion it true but the reason is false |
| D. | Both assertion and reason are false |
| Answer» C. Assertion it true but the reason is false | |
| 8. |
The gas having average speed four times as that of SO2 (molecular mass 64) is ___________ |
| A. | He(molecular mass 64) |
| B. | O2(molecular mass 4) |
| C. | H2(molecular mass 32) |
| D. | CH4(molecular mass 16) |
| Answer» B. O2(molecular mass 4) | |
| 9. |
The equation of state for g of oxygen at a pressure P, and temperature T, when occupying a volume V, will be? |
| A. | PV = (5/32)RT |
| B. | PV = 5RT |
| C. | PV = (5/2)RT |
| D. | PV = (5/16)RT |
| Answer» B. PV = 5RT | |
| 10. |
THE_TEMPERATURE_OF_H2_AT_WHICH_THE_RMS_VELOCITY_OF_ITS_MOLECULES_IS_SEVEN_TIMES_THE_RMS_VELOCITY_OF_THE_MOLECULES_OF_NITROGEN_AT_300K_IS?$ |
| A. | 2100K |
| B. | 1700K |
| C. | 1350K |
| D. | 1050K |
| Answer» E. | |
| 11. |
We_have_a_jar_filled_with_gas_characterised_by_parameters_P,_V_and_T_and_another_jar_B_filled_with_a_gas_with_parameters_2P,_V/4,2T;_where_the_symbols_have_their_usual_meanings._The_ratio_of_the_number_of_molecules_of_jar_A_to_those_of_jar_B_is$ |
| A. | 1:1 |
| B. | 1:2 |
| C. | 2:1 |
| D. | 4:1 |
| Answer» E. | |
| 12. |
Average velocity of a gas becomes 4 times. What will be the effect on rms velocity at the same temperature? |
| A. | 1.4 times |
| B. | 4 times |
| C. | 3 times |
| D. | 2 times |
| Answer» C. 3 times | |
| 13. |
If an ideal gas has a volume V at 27°C and it is heated at a constant pressure, so that its volume becomes 1.5V, then the value of final temperature is$ |
| A. | 327K |
| B. | 177°C |
| C. | 873K |
| D. | 600°C |
| Answer» C. 873K | |
| 14. |
If a given mass of gas occupies a volume of 10cc at 1 atmospheric pressure and temperature 100°C, what will be its volume at 4 atmospheric pressure, the temperature being the same?$ |
| A. | 100cc |
| B. | 400cc |
| C. | 104cc |
| D. | 2.5cc |
| Answer» E. | |
| 15. |
R/Cv =0.67 for a gas. Then this gas is made up of which molecules? |
| A. | Diatomic |
| B. | Mixture of diatomic and polyatomic |
| C. | Monoatomic |
| D. | Polyatomic |
| Answer» D. Polyatomic | |
| 16. |
Assertion: Air pressure in a car tyre increases during driving |
| A. | |
| B. | Both assertion and reason are true and the reason is the correct explanation of the assertion |
| C. | Both assertion and reason are true but the reason is not a correct explanation of the assertion |
| Answer» C. Both assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 17. |
The gas having average speed four times as that of SO2 (molecular mass 64) is |
| A. | He(molecular mass 64) |
| B. | O<sub>2</sub>(molecular mass 4) |
| C. | H<sub>2</sub>(molecular mass 32) |
| D. | CH<sub>4</sub>(molecular mass 16) |
| Answer» B. O<sub>2</sub>(molecular mass 4) | |
| 18. |
Two gases are at absolute temperatures 300K and 350K respectively. What is the ratio of average kinetic energy of their molecules? |
| A. | 7:6 |
| B. | 6:7 |
| C. | 36:49 |
| D. | 49:36 |
| Answer» C. 36:49 | |
| 19. |
The equation of state for g of oxygen at a pressure P, and temperature T, when occupying a volume V, will be |
| A. | PV = (5/32)RT |
| B. | PV = 5RT |
| C. | PV = (5/2)RT |
| D. | PV = (5/16)RT |
| Answer» B. PV = 5RT | |