Question:
Which of the following is not negatively charged sol?
Which of the following is not negatively charged sol?
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Metals and Sulfides = Negative (-). Metal Hydroxides and Blood/Haemoglobin = Positive (+).
Updated On: May 14, 2026
- $\text{As}_2\text{S}_3$
- Haemoglobin
- Clay
- Congo Red
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Concept
Colloidal sols carry an electric charge which determines their stability and behavior in an electric field.
Step 2: Meaning
Sols are classified as positively or negatively charged based on the nature of the charge on the dispersed particles.
Step 3: Analysis
Metal sulfides like $\text{As}_2\text{S}_3$, acid dye stuffs like Congo Red, and starch/clay are typically negatively charged. Haemoglobin and metal hydroxides (like $\text{Fe(OH)}_3$) are examples of positively charged sols.
Step 4: Conclusion
Haemoglobin is a positively charged sol, therefore it is NOT a negatively charged sol. Final Answer: (B)
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