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The temperature at which solid melts to become a liquid at the atmospheric pressure is called its melting point. The melting point of a solid is an indication of

The temperature at which solid melts to become a liquid at the atmospheric pressure is called its melting point. The melting point of a solid is an indication of Correct Answer Strength of the intermolecular forces of attraction

The correct answer is option 1 i.e. Strength of the intermolecular forces of attraction.

Intermolecular forces

  • Intermolecular forces are the attractive and repulsive forces that arise between the molecules of a substance.
  • Intermolecular forces are mainly responsible for the physical characteristics of the substance.
  • The stronger the noncovalent interactions between molecules, the more energy that is required, in the form of heat, to break them apart.
  • The boiling point and melting point of a substance is proportional to the strength of its non-covalent intermolecular forces i.e. the stronger the intermolecular forces, the higher the boiling point and melting point. Hence option 1 is correct.
  • The strongest intermolecular force is the hydrogen bond.
  • The weakest intermolecular forces are London dispersion forces.

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