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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper II covers chemistry.

UPSC Combined Geo-Scientist, Prelims · 2025 · Paper II, Chemistry · Q32 of 120

Geo-Scientist Prelims 2025 Chemistry Q32: Which one of the following statements regarding Ostwald’s Law of…

QuestionElectrochemistry / Ostwald's dilution law

Which one of the following statements regarding Ostwald’s Law of Dilution is not correct ?

  1. (a) It is only applicable to weak electrolytes at equilibrium where the dissociation constant K, can be related to degree of ionization (α) and concentration c (in m/L) as K = α² c (1 – α).
  2. (b) It is only valid for dilute solutions, where the concentration of the electrolyte is very low.
  3. (c) It is applicable to strong as well as weak electrolytes at extreme dilution, if temperature of the solution remains constant during the dilution process.
  4. (d) The electrolyte solution must behave ideally, which means that the interactions between the solvent and solute particles should be negligible.

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