JEE Main Chemistry question
Not in JEE Main or NEET syllabus
From the given sols, how many can coagulate silicic acid sol?
, , , starch, clay, , CdS, basic dye
Answer: 4
Solution
Silicic acid sol is negatively charged, so it is coagulated only by sols/species that are positively charged. Among the list, , , and the basic dye
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