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 19 of 23
- A. 54 K
- B. 600 K
- C. 54 °C
- D. 600 °C
Explanation: The explanation for this question will be added soon.
Correct answer: 600 K- A. 8.314 J mol-3K-3
- B. 1.38J mole-1 K-3
- C. 1.38J mole-1 K-1
- D. 8.314 J mole-1 K-1
Explanation: Physically, the gas constant is the constant of proportionality that relates the energy scale in physics to the temperature scale, when a…
Correct answer: 8.314 J mole-1 K-1- A. P = nRT
- B. PV = RT
- C. V = nRTP
- D. PV = nRT
Explanation: According to the Ideal Gas equation: The product of Pressure & Volume of a gas bears a constant relation with the product of Universal gas…
Correct answer: PV = nRT- A. PV=nRT
- B. PT=nRv
- C. P=nRT
- D. T=npv/R
Explanation: The ideal gas equation is formulated as: PV = nRT. In this equation, P refers to the pressure of the ideal gas, V is the volume of the…
Correct answer: PV=nRT- A. Temperature is lowered & pressure is increased
- B. Temperature is increased & pressure is lowered
- C. Temperature & pressure both are lowered
- D. Temperature & pressure both are increased
Explanation: To prevent the volume of a given gas from expanding when its mass is increased, you should lower the temperature and increase the pressure…
Correct answer: Temperature is lowered & pressure is increased- A. Volume
- B. Temperature
- C. Pressure
- D. Number of motes
Explanation: While each of these variables (volume, temperature, pressure) can change in different gas laws, the number of moles (n) is generally…
Correct answer: Number of motes- A. Cannot be predicted
- B. Is reduced to 1/2
- C. Remains unchanged
- D. Is doubled
Explanation: Temp is directly proportionsl to pressure and pressure is inversely proportional to volume.
Correct answer: Remains unchanged- A. Temperature and pressure is increased
- B. Temperature is lowered and pressure is decreased
- C. Temperature and pressure is decreased
- D. Temperature is lowered and pressure is increased
Explanation: Option A: Temperature and pressure increased is incorrect because increasing the temperature and pressure would cause the gas to expand…
Correct answer: Temperature is lowered and pressure is increased- A. 8.314 Jmol-1K-1
- B. 8.314 dm 3atm mol-IK-I
- C. 0.0821 dm3atm mol-I K-1
- D. 0.0821 Jmol-1K-1
Explanation: a) 8.314 J mol^(-1) K^(-1)Explanation: This option suggests that the value of the universal gas constant in SI units is 8.314 J mol^(-1)…
Correct answer: 8.314 Jmol-1K-1- A. 8.314 J/mol x K
- B. 1.38 x 10^-23 J/K
- C. 6.63 x 10^-11 Nm2/kg2
- D. 1.6 x 10^-19 C
Explanation: The dimensions of the universal gas constant R are energy per degree per mole.
Correct answer: 8.314 J/mol x K- A. 2.44
- B. 23.2
- C. 48.93
- D. 2.32
Explanation: The ratio of the rate of diffusion of the given gases is 0.58:0.55 or 1.112.
Correct answer: 48.93- A. 4
- B. 16
- C. 10.5
- D. 30
Explanation: According to Graham's law of diffusion; RH2/RO2 = √MO2/ √MH2 RH2/RO2 = √32/√2 = 4. Hence, the correct option is A.
Correct answer: 4- A. Plasma state
- B. Liquid state
- C. Solid state
- D. Super condensed state
Explanation: a) Plasma state:In intense electric fields and at very high temperatures, matter can exist in a plasma state.
Correct answer: Plasma state- A. 16
- B. 36
- C. 6
- D. 24
- E. 72
Explanation: The explanation for this question will be added soon.
Correct answer: 72- A. Solids
- B. Liquid
- C. Gases
- D. All of these options are correct
Explanation: Gases have the weakest intermolecular forces while these forces are at intermediate level in liquids and strongest in solids.
Correct answer: Gases- A. Kinetic theory of gases
- B. Crystal field theory
- C. Molecular orbital theory
- D. Transition state theory
Explanation: KMT of gases suggests that idea that molecules are in constant motion
Correct answer: Kinetic theory of gases- A. Translational motion
- B. Vibrational motion
- C. Rotational motion
- D. Linear motion
Explanation: OPTION A: There is no translational motion in solids due to strong intermolecular forces.OPTION B: According to Kinetic Molecular…
Correct answer: Vibrational motion378. The existence of matter in our surrounding in different states is due to the difference of -------
- A. Repulsive force
- B. Interacting force
- C. Creative force
- D. None of these
Explanation: Option B is correct since each state of matter has a different strength of interacting forces; the strength of the force is maximum in…
Correct answer: Interacting force- A. High
- B. Low
- C. Moderate
- D. Same
Explanation: The effusion of a gas is its movement through an extremely small opening of molecular size into a region of low pressure.
Correct answer: Low- A. Berzelius
- B. William Crooks
- C. Dalton
- D. Rutherford
Explanation: The existence of 'the fourth state of matter' was first identified by Sir William Crookes in 1879.
Correct answer: William Crooks