Substances among the following that can precipitate the negatively charged emulsions are-
a. KCI
b. Glucose
c. Urea
d. NaCl
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Hint: Electrolyte that produces ion can precipitate the negatively charged emulsions
The droplets present in emulsion has negative charge. It can be precipitated by adding electrolyte such as KCI, NaCl etc. Since, glucose and urea do not produce ions on dissolving in water.
Hence, they are non-electrolyte and cannot precipitate the negatively charged emulsion
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