In which of the sols, the colloidal particles are with negative charge?

Question

Canvas Classes · Accepted Answer

🧠 Sorting the Sols
This is a standard classification of lyophobic and lyophilic sols based on their surface charge. Most metal hydroxides are positive, while most metals and non-metals are negative.

🗺️ Charge Classification
- Positively Charged Sols:
  - Hydrated metal oxides: , , .
  - Basic dyes like methylene blue.
  - Oxides like .
  - Haemoglobin (in blood).
- Negatively Charged Sols:
  - Metals like Gold, Silver, Copper.
  - Metallic sulphides like , , .
  - Acid dyes like eosin, congo

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