Which is a natural colloid?

An aerosol is a type of colloid in which.......

Which of the following is a multimolecular colloid?

The sol formed in the following unbalanced equation is $As_2O_3 + H_2S \rightarrow$

In a colloidal solution,both the dispersed phase and dispersion medium are in liquid phase. What is the type of colloid?

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 $ . . . . . . $?