The dispersed phase in colloidal iron (III) hydroxide and collodial gold is positively and negtively charged respectively with of the following statement is not correct ?

Options

A. Mixing the sols has no effect
B. Coagulation in both sols can be brought about by electrophoresis
C. Magnesium chloride solution coagulates, the gold sol more readily than the iron (III) hyroxide sol.
D. Sodium sulphate solution causes coagulation in both sols.

Answer

A