| 1 |
At constant temperature and pressure, if volume of given mass of a gas is doubled then density is. |
- A. Doubled
- B. 1/4 original
- C. 1/2 of original
- D. Unchanged
|
| 2 |
An ideal reversible heat engine has |
- A. 100% efficiency
- B. Highest efficiency
- C. 80%
- D. 90%
|
| 3 |
Almost all the raw energy is librated from |
- A. Heat
- B. Earth
- C. Light
- D. All of these
|
| 4 |
No of spark plugs needed in the diesel engine are. |
|
| 5 |
The potential energy to the molecules of an ideal gas is considered to be. |
- A. Maximum
- B. Zero
- C. 1/2 kx<sup>2</sup>
- D. 1/2 kx
|
| 6 |
When hot and cold water are mixed, the entropy. |
- A. Decreases
- B. Increases
- C. Remain constant
- D. Zero
|
| 7 |
The mean kinetic energy of gas is at. |
- A. 0 <sup>o</sup>C
- B. -273 <sup>o</sup>C
- C. 100 K
- D. 100 <sup>o</sup>C
|
| 8 |
A device based upon the thermodynamics property of matter is called. |
- A. Calorimeter
- B. Heat engine
- C. thermometer
- D. Voltmeter
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| 9 |
The difference between two molar capacities is equal to. |
- A. Plank's constant
- B. General gas constant
- C. Molar gas constant
- D. Boltzmann constant
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| 10 |
Which remains constant in an adiabatic process. |
- A. Volume
- B. Pressure
- C. entropy
- D. temperature
|