Chemistry Gases BUMHS 2023
PMDC Verified Question 27 of 65
A set of postulates that explain the behavior of ideal gases is called:
A
Bohr theory
B
Kinetic molecular theory of gases
C
Rutherford theory
D
Dalton's theory
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Kinetic molecular theory of gases
Concept:

To bridge the gap between microscopic molecular action and macroscopic gas laws (like Boyle's and Charles's laws), physicists developed a comprehensive theoretical model.

Solution:

  • This model is called the Kinetic Molecular Theory (KMT) of gases.


  • It consists of several key postulates: gases are composed of constantly moving point masses, their collisions are perfectly elastic, they have no intermolecular forces, and their average kinetic energy is directly proportional to the Kelvin temperature.


  • These postulates mathematically derive the ideal gas law (\( PV=nRT \)).


Why other options are incorrect:

  • Option A: Bohr theory explains the quantized electron orbits in hydrogen atoms.
  • Option C: Rutherford theory established the nuclear model of the atom (dense nucleus, empty space).
  • Option D: Dalton's atomic theory postulates that matter is composed of indivisible atoms (though he did have a law of partial pressures, the comprehensive behavior of gases is KMT).

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