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Q40 (NDA-I/2013) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Basic chemical principles Answer Verified

Water is a good solvent. This is due to high

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Explanation

Water is considered an excellent solvent primarily due to its high dielectric constant, which is approximately 78 at 25°C. The dielectric constant measures a medium's ability to shield electrical charges from one another. According to Coulomb's law, the force between ions is inversely proportional to the dielectric constant of the solvent; thus, water's high value significantly reduces the attractive forces between positive and negative ions in a solute, allowing them to dissociate and dissolve [3]. While water also possesses high specific heat [2], high heat of fusion, and high surface tension [2], these properties relate to its thermal stability and cohesive behavior rather than its capacity to dissolve substances. Its polarity and ability to form hydrogen bonds further support its role as a 'universal solvent' by facilitating interactions with various ionic and polar compounds.

Sources

  1. [3] https://www.sciencedirect.com/topics/materials-science/physical-properties-of-water
  2. [2] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 14: Climate > FACTORS INFLUENCTNG TEMPERATURE > p. 134
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