Chemistry
Grade-6
Easy
Question
Which of the following statements is not correct?
- Nitrogen is used as a refrigerant to preserve biological materials.
- Nitrogen cannot be directly absorbed in free form by plants.
- Oxygen can be liquified at high pressure and high temperatures.
- Oxygen gas is slightly heavier than air.
Hint:
An ideal gas cannot be liquefied because there is no intermolecular force of attraction between the ideal gas molecules.
The correct answer is: Oxygen can be liquified at high pressure and high temperatures.
The statement "Oxygen can be liquified at high pressure and high temperatures" is not correct.
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