Medium MCQ +4 / -1 PYQ · JEE Mains 2022

Which of the following statement is incorrect?

  1. A Low solubility of LiF in water is due to its small hydration enthalpy. Correct answer
  2. B $\mathrm{KO}_{2}$ is paramagnetic.
  3. C Solution of sodium in liquid ammonia is conducting in nature.
  4. D Sodium metal has higher density than potassium metal.

Solution

Low solubility of LiF in water is due to the fact that though $\mathrm{Li}^{+}$ is having high hydration enthalpy but it has higher lattice enthalpy when present in LiF. Due to higher lattice enthalpy its solubility is less.

About this question

Subject: Chemistry · Chapter: s-Block Elements · Topic: Alkali Metals

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