Free Gases MCQs with Answers
443 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.
Gas behaviour is explained through the kinetic molecular theory and the relationships among pressure, volume and temperature. Work includes STP, Boyle's and Charles's laws, absolute zero, the ideal gas equation, and the distinction between ideal and real gases, especially the effects of intermolecular forces and molecular volume.
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443 questions · page 14 of 23
- A. Definite volume
- B. Strong intermolecular forces
- C. Smaller distance
- D. Constant motion
Explanation: The presence of the process of diffusion in liquids is due to the random movement of molecules or particles within the liquid.
Correct answer: Constant motion- A. Potential energy
- B. Kinetic energy
- C. Both A & B
- D. None of these
Explanation: liquids can be converted to solids by lowering their kinetic energy.When a liquid is cooled, its kinetic energy decreases, and the…
Correct answer: Kinetic energy- A. Solids
- B. Liquids
- C. Gases
- D. All of these
Explanation: Intermolecular forces are the forces of attraction between molecules. These forces play a significant role in determining the physical…
Correct answer: Gases- A. High
- B. Low
- C. Moderate
- D. Same
Explanation: Effusion is the movement of a gas through a small opening, such as a pinhole, into a region of lower pressure.
Correct answer: Low- A. Directly
- B. Inversely
- C. Equally
- D. Highly
Explanation: The rate of diffusion or effusion is inversely proportional to the square root of its density at constant temperature and pressure.
Correct answer: Inversely- A. Solids
- B. Liquids
- C. Gases
- D. All of these options are correct
Explanation: Option A: Properties of Solids:Solid has a fixed shape and a fixed volume.Solid cannot be compressed.Solids have a high density.Force of…
Correct answer: Gases- A. Berzelius
- B. Boltzmann
- C. Bernoulli
- D. Maxwell
Explanation: It was first proposed by Bernoulli and then enhanced by Maxwell. In order to illustrate the behaviour of gases quantitatively, Bernoulli…
Correct answer: Bernoulli- A. Solids
- B. Liquids
- C. Gases
- D. Both B and C
Explanation: Liquids and gases consist of molecules that can collide among themselves and exchange energy.
Correct answer: Both B and C- A. Effusion
- B. Diffusion
- C. Mixing
- D. None of these
Explanation: Diffusion is a process by which particles move from an area of high concentration to an area of low concentration.
Correct answer: Diffusion- A. Stable
- B. Metastable
- C. Parastable
- D. Prestable
Explanation: The magnetic field create low energy plasma which create molecules of Meta stable state.
Correct answer: Metastable- A. Protons
- B. Electrons
- C. Neutrons
- D. All of these
Explanation: Option B is correct as plasma is a substance that is superheated to such an extent that it'd electrons are ripped from it, creating an…
Correct answer: Electrons- A. 6 times
- B. 4 times
- C. One fourth
- D. One eighth
Explanation: rateA/rateB = √molar mass B/molar mass A So, √2÷32 = √0.0625 = 0.25 or 1/4
Correct answer: One fourth- A. Low temperature
- B. High temperature
- C. Low pressure
- D. High pressure
Explanation: Plasma is difficult to maintain at low formed at high temperatures. Actually, plasma is there is vigorous collision between atoms and…
Correct answer: Low temperature- A. HCl
- B. NH3
- C. Equally
- D. Both
Explanation: The gas that travels faster will depend on the conditions of the experiment.
Correct answer: NH3- A. Atmosphere
- B. Liquid
- C. Container
- D. Gas
Explanation: If the manometer is a closed-tube manometer, then typically the side with the mercury will face the atmosphere, and the other side will…
Correct answer: Atmosphere- A. Auroras
- B. Flames
- C. Bolts
- D. All of these options are correct
Explanation: On Earth, plasma occurs in a few limited places like lightning bolts, flames, auroras, and fluorescent lights.
Correct answer: All of these options are correct277. An unknown gas diffuses 5 times slower than that of H2. The molecular mass of the unknown gas is:
- A. 50
- B. 10
- C. 15
- D. 25
Explanation: According to Graham's law of diffusion of gases, the rate of diffusion is inversely proportional to the square root of molar masses of…
Correct answer: 50- A. HCL
- B. CO2
- C. C2H2
- D. C2H6
Explanation: Graham Law states Rate of Diffusion ∝ 1/√(MolecularMass) Option A: HCl has molecular mass 36g Option B: CO2 has molecular mass 44g Option…
Correct answer: C2H2- A. High temperature and low pressure
- B. Low temperature and high pressure
- C. At standard temperature and pressure
- D. At high temperature and high pressure
Explanation: The effect of intermolecular forces is much more prominent at low temperatures because the molecules have less kinetic energy to overcome…
Correct answer: Low temperature and high pressure- A. Gases are considered to be composed of minute discrete particles called molecules.
- B. The molecules move in straight line.
- C. The pressure of gas is produced due to the collision of molecules with the wall of container.
- D. The volume occupied by the gas molecules is negligible as compared to the the total volume of the gas.
Explanation: This is because when you increase the pressure, the particles are closer together.
Correct answer: The volume occupied by the gas molecules is negligible as compared to the the total volume of the gas.