A) Coagulation in both sols can be brought about by electrophoresis
B) Mixing the sols has no effect
C) Sodium sulphate solution causes coagulation in both sols
D) Magnesium chloride solution coagulates, the gold sol more readily than the iron (III) hydroxide sol
Correct Answer: B
Solution :
Mixing the sols together can cause coagulation, since the charges are neutralised.
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