What is the movement of colloidal particles under the influence of an electric field called?

Which among the following is an example of a one-dimensional nanostructure?

In which of the following,the sol is not correctly matched with respect to its charge?
$I$. $Al_2O_3 \cdot xH_2O$ sol; $+ve$ sol
$II$. Starch sol; $+ve$ sol
$III$. $TiO_2$ sol; $-ve$ sol
$IV$. Methylene blue sol; $+ve$ sol
The correct answer is

Tyndall effect is more pronounced in

$A$ micelle is a.......

Which of the following processes does $NOT$ result in coagulation?