The dispersed phase in colloidal iron(III) hydroxide and colloidal gold is positively and negatively — Surface Chemistry Chemistry Question

💡 Solution & Explanation

Mixing a positively charged iron(III) hydroxide sol with a negatively charged gold sol leads to neutralization of charges and subsequent precipitation, a process known as mutual coagulation. Therefore, the statement that "mixing of the sols has no effect" is entirely incorrect. Therefore, correct answer is C.