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Greater the valency, the higher is the c...

Greater the valency, the higher is the coagulating power of ion. This rule was introduced by

A

Hard-Schulze

B

Graham

C

Kossel and Lewis

D

Faraday

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The correct Answer is:
To solve the question regarding the rule that states "Greater the valency, the higher is the coagulating power of ion," we will follow these steps: ### Step-by-Step Solution: 1. **Understanding the Question**: The question asks about a specific rule related to the coagulating power of ions in colloidal solutions. 2. **Identifying Key Terms**: The key terms here are "valency," "coagulating power," and "ion." Valency refers to the combining capacity of an element, and coagulating power refers to the ability of an ion to cause the aggregation of colloidal particles. 3. **Reviewing the Options**: The options provided are: - Option 1: Hardy-Screws - Option 2: Graham - Option 3: Kossel and Lewis - Option 4: Faraday 4. **Recalling Relevant Rules**: The Hardy-Screws rule states that the coagulating power of an ion is directly related to its valency. Higher valency ions are more effective at coagulating colloidal solutions. 5. **Selecting the Correct Answer**: Based on the Hardy-Screws rule, we conclude that the correct answer to the question is **Option 1: Hardy-Screws**. ### Final Answer: The rule stating "Greater the valency, the higher is the coagulating power of ion" was introduced by **Hardy-Screws**. ---
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