Discussion
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- Question
The value of 1 mm of Hg is equal to
Options- A. 1.333 N/m2
- B. 13.33 N/m2
- C. 133.3 N/m2
- D. 1333 N/m2
- Correct Answer
- 133.3 N/m2
- 1. An adiabatic process is one in which
Options- A. no heat enters or leaves the gas
- B. the temperature of the gas changes
- C. the change in internal energy is equal to the mechanical workdone
- D. all of the above Discuss
- 2. The entropy __________ in an irreversible cyclic process.
Options- A. remains constant
- B. decreases
- C. increases Discuss
- 3. According to Avogadro's law, the density of any two gases is __________ their molecular masses, if the gases are at the same temperature and pressure.
Options- A. equal to
- B. directly proportional to
- C. inversely proportional to Discuss
- 4. Carbonisation of coal consists of
Options- A. drying and crushing the coal to a fine powder
- B. moulding the finely ground coal under pressure with or without a binding material
- C. heating the wood with a limited supply of air to temperature not less than 280°C
- D. none of the above Discuss
- 5. Which of the following has the minimum atomic mass?
Options- A. Oxygen
- B. Sulphur
- C. Nitrogen
- D. Carbon Discuss
- 6. The efficiency of Diesel cycle approaches to Otto cycle efficiency when
Options- A. cut-off is increased
- B. cut-off is decreased
- C. cut-off is zero
- D. cut-off is constant Discuss
- 7. The kinetic energy of molecules of a gas becomes zero at absolute zero temperature.
Options- A. Agree
- B. Disagree Discuss
- 8. The pressure exerted by an ideal gas is __________ of the kinetic energy of all the molecules contained in a unit volume of gas.
Options- A. one-half
- B. one-third
- C. two-third
- D. three-fourth Discuss
- 9. The sum of internal energy (U) and the product of pressure and volume (p.v) is known as
Options- A. workdone
- B. entropy
- C. enthalpy
- D. none of these Discuss
- 10. In the first law of thermodynamics, the total energy of the system remains constant.
Options- A. True
- B. False Discuss
Thermodynamics problems
Search Results
Correct Answer: all of the above
Correct Answer: increases
Correct Answer: directly proportional to
Correct Answer: none of the above
Correct Answer: Carbon
Correct Answer: cut-off is zero
Correct Answer: Agree
Correct Answer: two-third
Correct Answer: enthalpy
Correct Answer: True
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