What are the physical states of the dispersed phase and dispersion medium,respectively,in a colloidal system like an insecticide spray?

The process of separating colloidal particles from crystalloid impurities using a semipermeable membrane is known as:

Statement $I:$ For colloidal particles,the values of colligative properties are of small order as compared to values shown by true solutions at the same concentration.
Statement $II:$ For colloidal particles,the potential difference between the fixed layer and the diffused layer of opposite charges is called the electrokinetic potential or zeta potential.
In the light of the above statements,choose the correct answer from the options given below.

The coagulation values in millimoles per litre of the electrolytes used for the coagulation of $As_2S_3$ are given below:
$I$. $(NaCl) = 52,$
$II$. $(BaCl_2) = 0.69,$
$III$. $(MgSO_4) = 0.22$
The correct order of their coagulating power is:

Which of the following methods is used for sol destruction?

Mixing of positively charged colloidal solution with negatively charged colloidal solution brings $ . . . . . . $. The decreasing order of coagulating power of $Na^{+}$,$Ba^{2+}$ and $Al^{3+}$ for negatively charged colloidal solution is $ . . . . . . $?