Free Real and Ideal Gases MCQs with Answers
97 Real and Ideal Gases MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
An ideal gas is modelled as particles with negligible volume and no intermolecular attraction, obeying Boyle's, Charles's and Avogadro's laws through PV = nRT. Real gases deviate from this behaviour, especially at high pressure and low temperature, because particle volume and attractive forces matter; the van der Waals equation explains these corrections.
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97 questions · page 5 of 5
- A. H2SO4
- B. HNO3
- C. both A and B
- D. none
Explanation: Sulfur dioxide is oxidised to sulfuric acid and nitrogen oxides form nitric acid in atmospheric moisture, so acid rain commonly contains…
Correct answer: both A and B- A. H2
- B. He
- C. N2
- D. CO
Explanation: The real gas that acts most like an ideal gas is helium. Because it exists in a single atom and its vander waals forces are very low.
Correct answer: He- A. Freezing effect
- B. Joule Thomson effect
- C. Boyles effect
- D. J Perrin effect
Explanation: Joule-Thomson effect, also called Joule-Kelvin effect, the change in temperature that accompanies expansion of a gas without production of…
Correct answer: Joule Thomson effect- A. H2
- B. N2
- C. CO2
- D. Cl
Explanation: The least value of van der waal cont is of H2 because of its small size and non polar character i.e, 0.245 atm dm3/mol.
Correct answer: H2- A. Expansion factor
- B. Depression factor
- C. Compressibility factor
- D. Diffusion factor
Explanation: Compressibility Factor is also often defined as "the ratio of molar volume of gas to that of an ideal gas." It is expressed as Z = pV /…
Correct answer: Compressibility factor- A. Freezing effect
- B. Joule Thomson effect
- C. Boyle's effect
- D. J.Perrin effect
Explanation: Answer: B Joule Thomson effect is the phenomenon accompanying a change in temperature due to a rapid change in the volume of a gas (rapid…
Correct answer: Joule Thomson effect- A. 95.56g/dm3
- B. 64.51 g/dm3
- C. 74.42g/dm3
- D. 99.9 g/dm3
Explanation: The critical volume of oxygen 74.42 cm3/mol. So the correct answer is C.
Correct answer: 74.42g/dm3- A. Solid.
- B. Liquid.
- C. Gas
- D. Isotope
Explanation: In thermodynamics, in the PV diagram, if liquid and vapor are present in equilibrium at a point, we call it a critical point.
Correct answer: Liquid.89. At a given temperature and pressure, the one which shows marked deviation from ideal behavior is
- A. N2
- B. N3
- C. CO2
- D. He
Explanation: The gas with higher intermolecular forces has the most marked deviation, as one of the assumptions of an ideal gas is that ideal gases…
Correct answer: CO2- A. Strong
- B. Moderate
- C. Weak
- D. Absent
Explanation: In an ideal gas, it is assumed that the intermolecular forces between gas molecules are absent.
Correct answer: Absent- A. Low temperature and low pressure
- B. High temperature and high pressure
- C. Low temperature and high pressure
- D. High temperature and low pressure
Explanation: Deviation from ideal gas behavior occurs primarily under high pressure and low temperature conditions.
Correct answer: Low temperature and high pressure- A. Hydrogen
- B. Nitrogen
- C. Methane
- D. Sulphur dioxide
Explanation: For gas to deviate from ideal behavior, there should be significant intermolecular forces present in the gas.
Correct answer: Sulphur dioxide- A. High temperature only
- B. High pressure only
- C. High pressure and low temperature
- D. Low pressure and high temperature
Explanation: High pressure and low temperature: Both high pressure and low temperature amplify intermolecular forces, leading to greater deviations…
Correct answer: High pressure and low temperature- A. Bronstect effect
- B. Joule Thomson effect
- C. Graham's effect
- D. Dalton's effect
Explanation: Therefore, the correct term is the "Joule-Thomson effect," which describes the cooling observed when a gas expands rapidly without any…
Correct answer: Joule Thomson effect- A. Xe
- B. H2
- C. CO2
- D. He
Explanation: Helium is an inert gas that exists as a single atom, resulting in the lowest conceivable van der Waals dispersion forces.
Correct answer: He- A. I, II, and III
- B. I and II only
- C. I and III only
- D. II and III only
Explanation: More significantly, the Van der Waals equation takes into consideration the molecular size and molecular interaction forces (attractive…
Correct answer: II and III only- A. Pressure
- B. Volume
- C. Temperature
- D. Concentration
Explanation: The compressibility factor (Z) is a measure of how much a gas deviates from ideal gas behavior.
Correct answer: Volume