Which among the following is a zero-dimensional nanostructure?

For the coagulation of a positively charged hydrated ferric oxide sol,the flocculating power of the ions is in the order:

Which of the following contributes to the extra stability of lyophilic colloids?

Which of the following methods can be used to destroy a sol?

Explain the following terms:
$(i)$ Electrophoresis
$(ii)$ Coagulation
$(iii)$ Dialysis
$(iv)$ Tyndall effect.

The correct statements with respect to dialysis of colloidal solution are
$I$. Colloidal particles can pass through the membrane.
$II$. Animal bladder can be used as membrane.
$III$. Cellophane is not used as membrane.
$IV$. Ions or small molecules can diffuse through membrane into water.