Paragraph: The most important property of hydrophobic colloidal...

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1. AAn acidic dyestuff hydrolyses yielding hydroxyl ions in solution and acquires an equivalent amount of positive charge on the particles
2. BAn acidic dyestuff ionises furnishing $\mathrm{H}^{+}$ions in solution and thereby leaving an equivalent amount of negative charge on the particles
3. CA basic dyestuff hydrolyses yielding $\mathrm{H}^{+}$ions in solution and thereby leaving the particles with an equivalent amount of negative charge
4. DA basic dyestuff ionises yielding hydroxyl ions in solution and thereby leaving an equivalent amount of positive charge on the particles