Entry Test MCQ :: Heat and Thermodynamics
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| 21. |
Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their |
| A. |
volume |
B. |
pressure |
| C. |
absolute temperature |
D. |
time |
Answer: Option C
Explanation:
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| 22. |
Which one of correct relation ? |
| A. |
Cp+Cv=? |
B. |
Cp=1+R/Cv |
| C. |
?=Cp/Cv |
D. |
Cp=1-R/Cv |
Answer: Option C
Explanation:
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| 23. |
The reading on the Fahrenheit scale will be double the reading on the centigrade scale when the temperature on the centigrade scale is |
Answer: Option C
Explanation:
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| 24. |
The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine |
| A. |
at any instant |
B. |
averagely |
| C. |
during its operation |
D. |
during one cycle |
Answer: Option D
Explanation:
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| 25. |
For a gas obeying Boyles law if the pressure is doubled the volume becomes |
| A. |
double |
B. |
one half |
| C. |
four times |
D. |
one fourth |
Answer: Option B
Explanation:
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| 26. |
Triple point of water is |
| A. |
273?C at 6.11 Kpa |
B. |
273K at 61.6 Kpa |
| C. |
273.16?C at 0.611 Kpa |
D. |
273.16K at 750 Kpa |
Answer: Option C
Explanation:
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| 27. |
Which of the following properties of molecules of a gas is same for all gases at particular temperature? |
| A. |
momentum |
B. |
mass |
| C. |
velocity |
D. |
kinetic energy |
Answer: Option D
Explanation:
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| 28. |
Boltzman constant K in terms of universal gas constant R and Avagadros number Na is give as |
| A. |
K = RNa |
B. |
K = R/Na |
| C. |
K = Na/Ra |
D. |
K = nRNa |
Answer: Option B
Explanation:
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| 29. |
Average translational kinetic energy per molecule of an ideal gas is given by |
| A. |
3NaT/2R |
B. |
2NaT/3 |
| C. |
3RT/2Na |
D. |
3Na/2RT |
Answer: Option C
Explanation:
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| 30. |
In which process entropy remains constant |
| A. |
isobaric |
B. |
isochoric |
| C. |
adiabatic |
D. |
isothermal |
Answer: Option C
Explanation:
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