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Matter in Our Surroundings — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings1 Mark
MCQ
A gas fills completely the vessel in which it is kept, because:
  • A
    Of weak intermolecular attractive forces.
  • B
    Of strong intermolecular attractive forces.
  • C
    Of very weak intermolecular repulsive forces.
  • D
    Of rigidity.
✓

Answer

  1. Of very weak intermolecular repulsive forces.

Explanation:

The force of attraction between particles of gas is negligible. Because of this, particles of gas move in all directions. Thus, a gas fills the vessel completely in which it is kept.

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