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The sol given below with

Question:

The sol given below with negatively charged colloidal particles is :

  1. $\mathrm{FeCl}_{3}$ added to hot water

  2. $\mathrm{KI}$ added to $\mathrm{AgNO}_{3}$ solution

  3. $\mathrm{AgNO}_{3}$ added to $\mathrm{KI}$ solution

  4. $\mathrm{Al}_{2} \mathrm{O}_{3} \cdot \mathrm{xH}_{2} \mathrm{O}$ in water


Correct Option: , 3

Solution:

Official Ans. by NTA (3)

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