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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)