Multiple choice

Which of the following statements is correct?

  1. Gases have no open surface.

  2. There is extreme attraction between gaseous particles.

  3. Inter-molecular force is maximum in gases.

  4. Gases can flow from higher levels to lower levels and are thus, called fluids.

  5. Gases have rigidity and compressibility.
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A Correct answer
Explanation

This is correct. Gases have no open surface. In gases, the inter-molecular forces of attraction are very weak. Hence, the particles move without any restriction in random motion. These thus, occupy any available space and move away if there is an open space. That is why gases do not have any open surface.

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