Question:
In which of the following, the sol is not correctly matched with respect to its charge?
In which of the following, the sol is not correctly matched with respect to its charge?
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Remember that sols like \( \text{TiO}_2 \) are typically negatively charged and starch forms a negative sol, not positive.
Updated On: May 15, 2025
- \( \text{Al}_2\text{O}_3 \cdot x\text{H}_2\text{O} \) sol : +ve sol
- \( \text{Al}_2\text{O}_3 \cdot x\text{H}_2\text{O} \) sol : -ve sol
- Starch sol : +ve sol
- \( \text{TiO}_2 \) sol : -ve sol
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The Correct Option is C
Solution and Explanation
- The sol formed by \( \text{TiO}_2 \) is negatively charged.
- \( \text{Al}_2\text{O}_3 \cdot x\text{H}_2\text{O} \) can form both positive and negative sols depending on the nature of the conditions, but typically, it forms positive sols.
- Starch forms a negative sol and not a positive one. Therefore, option (3) is incorrect.
Thus, the correct answer is \( \boxed{(3)} \).
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