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Question

According to ideal gas law, Which of the following is NOT true ?


A
Gas molecules have no intermolecular forces.
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B
Gas particles are in random motion.
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C
Gas particles have no volume.
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D
The collisions between any two gas particles arc elastic.
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E
The average kinetic energy of the gas molecules is proportional to the temperature in Celsius degrees.
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Solution

The correct option is E The average kinetic energy of the gas molecules is proportional to the temperature in Celsius degrees.
Average kinetic energy of the gas particles         $$K_{avg} = \dfrac{3}{2}k_B T$$                $$\implies K_{avg} \propto T$$
where  $$T$$ is the temperature of the gas and measured in Kelvin $$(K)$$.
Rest of the statements given are true.
Thus statement in option E is false.

Physics

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