Andhra Pradesh Board Solutions for Chapter: Surface Chemistry, Exercise 4: Questions

Explain the following terms
Tyndall effect
 

Explain the phenomenon observed
When a beam of light is passed through a colloidal sol
 

Explain the phenomenon observed
An electrolyte, $\mathrm{NaCl}$ is added to hydrated ferric oxide

 

An electric current Is passed through a colloidal solution. Explain the phenomenon observed.
 

Describe the Cottrell smoke precipitator with a neat diagram

Among $\mathrm{NaCl}, {\mathrm{Na}}_2{\mathrm{SO}}_4, {\mathrm{Na}}_3{\mathrm{PO}}_4$ electrolytes, which is more effective for coagulation of hydrated ferric oxide sol and why ?

Discuss how a lyophilic colloids protect a lyophobic colloids.

Discuss the use of colloids in purification of drinking water