Civil Services Prep

Prelims 2021 · Science and Technology · Question 71

Water can dissolve more substances than any other liquid because

  1. it is dipolar in nature
  2. it is a good conductor of heat
  3. it has high value of specific heat
  4. it is an oxide of hydrogen

Answer

it is dipolar in nature

  • (a) it is dipolar in nature — Water is a polar (dipolar) molecule with partial positive and negative ends, so it surrounds and dissolves many ionic and polar substances. Correct.
  • (b) it is a good conductor of heat — Heat conductivity has no direct role in dissolving substances; water is not exceptionally good at this compared to metals. Incorrect.
  • (c) it has high value of specific heat — Specific heat relates to temperature change, not solvent power. Incorrect.
  • (d) it is an oxide of hydrogen — This is chemically true, but that alone does not explain why it dissolves many substances. Incorrect.
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