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Q.

Which of the following substances will precipitate the negatively charged emulsions?

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a

KCI

b

Glucose

c

Urea

d

NaCl

answer is A.

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Detailed Solution

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 do not precipitate the negatively charged emulsion
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