If the dispersed phase is a liquid and the dispersion medium is a solid,the colloid is known as

Given below are two statements:
Statement $I:$ In the coagulation of a negative sol,the flocculating power of the three given ions is in the order - $Al^{3+} > Ba^{2+} > Na^{+}$
Statement $II:$ In the coagulation of a positive sol,the flocculating power of the three given salts is in the order - $NaCl > Na_{2}SO_{4} > Na_{3}PO_{4}$
In the light of the above statements,choose the most appropriate answer from the options given below:

Zeta potential is

Detergent action of soap is due to

Brownian motion arises due to ....

Surface tension of lyophilic sols is