JEE Main · ChemistryHard
Which of the following statements regarding the Hardy-Schulze rule for the coagulation of a negatively charged sol is correct?
- A.Coagulating power increases with the valency of the cation
- B.Coagulating power increases with the valency of the anion
- C.Coagulating power is independent of the valency of the ions
- D.Coagulating power decreases with the valency of the cation
Show correct answer & step-by-step solution
Correct answer: A — Coagulating power increases with the valency of the cation
Solution
- The Hardy-Schulze rule states that the ion causing coagulation must have a charge opposite to the sol.
- For a negatively charged sol, the coagulating ions are cations.
- The coagulating power increases significantly with the increase in the valency of the effective ion.
- Therefore, higher valency cations are more effective at coagulating a negative sol.
- Hence the answer is (A).
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