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From the given following sol how many ca...

From the given following sol how many can coagulate silica acid sol?
`Fe(OH)_(3),Ca(OH)_(2),Al(OH)_(3),` starch, clay, `As_(2)S_(3),CdS,` basic dye.

A

4

B

3

C

2

D

8

Text Solution

Verified by Experts

The correct Answer is:
A
Silicic acid is negatively charged sol. Hence the sol with positive charge can coagulate silicic acid i.e., `Fe(OH)_(3)` , basic dye.
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