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Kinetic molecular theory of gases and Molecular collisions Questions in English

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Class 11 Chemistry · States of Matter · Kinetic molecular theory of gases and Molecular collisions

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Which of the following statement$(s)$ is/are true?

The pressure of a fixed amount of an ideal gas is proportional to its temperature only

Frequency of collisions increases in proportion to the square root of temperature

The value of van der Waals constant '$a$' is smaller for ammonia than for nitrogen

If a gas is expanded at constant temperature,the kinetic energy of the molecules decrease

Solution

(B) According to the kinetic theory of gases,the average speed of gas molecules is proportional to $\sqrt{T}$. Since the frequency of collisions is directly proportional to the average speed of the molecules,it follows that the frequency of collisions increases in proportion to the square root of temperature $(\sqrt{T})$.

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