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In which of the following, the sol is not correctly matched with respect to its charge?
I. $\mathrm{Al}_2 \mathrm{O}_3 \cdot \mathrm{x} \cdot \mathrm{H}_2 \mathrm{O}$ sol; + ve sol
II. Starch sol; +ve sol
III. $\mathrm{TiO}_2$ sol; -ve sol
IV. Methylene blue sol; +ve sol
The correct answer is
Options:
I. $\mathrm{Al}_2 \mathrm{O}_3 \cdot \mathrm{x} \cdot \mathrm{H}_2 \mathrm{O}$ sol; + ve sol
II. Starch sol; +ve sol
III. $\mathrm{TiO}_2$ sol; -ve sol
IV. Methylene blue sol; +ve sol
The correct answer is
Solution:
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Verified Answer
The correct answer is:
II, III
Starch sol is a negatively-charged sol while $\mathrm{TiO}_2$ is a positively-charged sol.
Thus, II and III are not correctly matched.
Thus, II and III are not correctly matched.
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