Which one of the following statements is false for hydrophilic colloids?

They do not require electrolytes for stabillity

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Their coagulation is reversible

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Their viscosity is of the order of that of water

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Their surface tension is usually lower than that of dispersion medium

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Solution

The correct option is D Their viscosity is of the order of that of water
Hydrophilic colloids are water-loving colloids. The colloid particles are attracted toward water. They are also called reversible sols. Their surface tension is usually lower than water, due to break down of cohesive attractive forces of the water molecules at the surface. The viscosity of the hydrophilic sols are much higher than that of the dispersion medium.

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