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:

Which of the following ions will have maximum flocculating power for coagulation of ${\mathrm{As}}_2{\mathrm{S}}_3$ sol?

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?

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

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

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

Find out which of the following statements is incorrect concerning lyophobic sol?

To coagulate $100 \mathrm{ml}$ of a colloid, $1 \mathrm{litre}$ of $0.03\mathrm{N} {\mathrm{MgCl}}_2$ is required. Then, the flocculation value of ${\mathrm{MgCl}}_2$ is

How many of the following mixtures show Tyndall effect?

$\mathrm{a}.$ $\mathrm{aq}.$ $\mathrm{NaCl}$

$\mathrm{b}.$ Ferric hydroxide

$\mathrm{c}.$ $\mathrm{NaCl}$ in benzene

$\mathrm{d}.$ $\mathrm{aq}.$ urea

$\mathrm{e}.$ $\mathrm{aq}.$ starch

Isoelectric point refers to the ${\mathrm{H}}^{+}$ ion concentration at which, the colloidal particles

The charge on ${\mathrm{As}}_2{\mathrm{S}}_3$ sol is due to the adsorption of