Properties of Colloidal Solutions

Given below are two statements :
Statement $\mathrm{I}$ :
In the coagulation of a negative sol, the flocculating power of the three given ions is in the order -
${\mathrm{Al}}^{3+}>{\mathrm{Ba}}^{2+}>{\mathrm{Na}}^{+}$
Statement $\mathrm{II}$ :
In the coagulation of a positive sol, the flocculating power of the three given salts is in the order -
$\mathrm{NaCl}>{\mathrm{Na}}_2{\mathrm{SO}}_4>{\mathrm{Na}}_3{\mathrm{PO}}_4$
In the light of the above statements, choose the most appropriate answer from the options given below:

An electrical potential difference will be produced between the two ends of capillary or porous plug is due to the flow of _____.

Streaming potential is opposite to _____.

How does the streaming potential generated?

Streaming potential is the reverse of electro-osmosis. Justify.

What is streaming potential?

Colloidal particles are visible by:

Give an example where Tyndall effect is observed.

Coagulation can be done by electrophoresis. Define electrokinetic potential.

How does the precipitation of the colloidal solution carried out?

Match the entries in Column-I with the terms used to show the effect of process in Column-II ?

The right option for the statement "Tyndall effect is exhibited by", is:

Which particles float on the surface, when milk is cooled?

Give an example of coagulation by cooling.

Zeta potential is

The Tyndall effect is observed only when the following conditions are satisfied,

$\left(\mathrm{i}\right)$ The diameter of the dispersed particles is much smaller than the wavelength of the light used.

$\left(\mathrm{ii}\right)$ The diameter of the dispersed particle is not much smaller than the wavelength of the light used.

$\left(\mathrm{iii}\right)$ The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.

$\left(\mathrm{iv}\right)$ The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.

Arrange the following ions according to their coagulating power in the coagulation of arsenic sulphide sol.

${\mathrm{Na}}^{+}$,  ${\mathrm{Al}}^{3+}$ and ${\mathrm{Ba}}^{2+}$

Which of the following statements about colloids is false?

The simplest way to check whether a system is colloidal or not