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The coagulation of sol particles may be ...

The coagulation of sol particles may be brought in by :

A

boiling

B

persistent dialysis

C

adding electroyte

D

adding oppositely charged sol

Text Solution

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The correct Answer is:
To solve the question regarding the coagulation of sol particles, we will analyze each option provided and determine whether it can lead to coagulation. ### Step-by-Step Solution: 1. **Understanding Coagulation**: Coagulation refers to the process where colloidal particles aggregate together to form larger particles or precipitates. This can occur due to various methods, including the addition of electrolytes or changes in the environment. 2. **Option A: Boiling**: - When a colloidal solution is boiled, the dispersion medium (liquid) evaporates. As the liquid evaporates, the concentration of the sol particles increases, leading to their aggregation and ultimately precipitation. - **Conclusion**: Boiling can cause coagulation. **(Correct)** 3. **Option B: Persistent Dialysis**: - In dialysis, a semipermeable membrane is used to separate sol particles from the dispersion medium. The sol particles move from an area of higher concentration to an area of lower concentration, which can lead to the removal of stabilizing ions and result in coagulation. - **Conclusion**: Persistent dialysis can cause coagulation. **(Correct)** 4. **Option C: Adding Electrolyte**: - When an electrolyte is added to a colloidal solution, it can neutralize the charge on the dispersed particles. If the particles are negatively charged, adding a positively charged electrolyte can lead to coagulation as the charge neutralization causes the particles to aggregate. - **Conclusion**: Adding electrolyte can cause coagulation. **(Correct)** 5. **Option D: Adding Oppositely Charged Salt**: - Similar to adding an electrolyte, introducing a salt with an opposite charge to the colloidal particles will neutralize their charge, leading to coagulation. For example, adding a positively charged salt to a negatively charged colloid will promote aggregation. - **Conclusion**: Adding oppositely charged salt can cause coagulation. **(Correct)** ### Final Conclusion: All options (A, B, C, and D) can lead to the coagulation of sol particles.
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