Question
Question: When iron hydroxide colloidal sol which is positively charged, and colloidal gold which is negativel...
When iron hydroxide colloidal sol which is positively charged, and colloidal gold which is negatively charged are mixed, which of the following observations is not correct ?
A
(a) There is no effect of mixing the sols.
A
(b) Coagulation in both sols can be brought about.
A
(c) Ferric hydroxide is coagulated.
A
(d) Gold sol is coagulated.
Explanation
Solution
(b)
Sol. Since the sols are oppositely a film of lyophilic sol is takes place.