Difficult
Which of the following statement$(s)$ is/are true?
- AThe pressure of a fixed amount of an ideal gas is proportional to its temperature only
- BFrequency of collisions increases in proportion to the square root of temperature
- CThe value of van der Waals constant '$a$' is smaller for ammonia than for nitrogen
- DIf a gas is expanded at constant temperature, the kinetic energy of the molecules decrease
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