Identify the postulates which help to formulate a mathematical model of gases.(I) A finite volume of gas consists of a very large number of molecules.(Il) The size of the molecules is much smaller than the separation between molecules.(III) Molecules do not exert force on each other except during a collision.
Correct answer: E. I, II and III
- A. I only
- B. II only
- C. III only
- D. I and II only
- E. I, II and III
Explanation
All of these statements are correct about the kinetic molecular theory of gases which tells us about the mathematical model of gas.1. It is correct as volume of a gas contains large number of gas molecules2. Size of gas molecules is very small compared to that of the container and the spaces between molecules so it is only correct3. Molecules undergo elastic collision and exert force on each other.
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Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
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