Question:
The charges on the colloidal CdS sol and TiO₂ sol are, respectively :
The charges on the colloidal CdS sol and TiO₂ sol are, respectively :
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Mnemonic: "S" in Sulfide stands for "Sub-zero" (Negative). Hydroxides and Oxides are usually Positive.
Updated On: Jan 12, 2026
- positive and positive
- negative and positive
- positive and negative
- negative and negative
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The Correct Option is B
Solution and Explanation
Step 1: Metallic sulfides generally form negatively charged sols. Therefore, CdS (Cadmium Sulfide) sol is negative.
Step 2: Metal oxides and hydrated metallic oxides generally form positively charged sols. Therefore, \(TiO_2\) sol is positive.
Step 2: Metal oxides and hydrated metallic oxides generally form positively charged sols. Therefore, \(TiO_2\) sol is positive.
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