What is the physical state of the dispersed phase in an emulsion?

Which of the following statements is incorrect about colloidal solutions?

The blue color of the sky is due to $.....$.

The impurities present in rain water possess $.....$ charge.

$A$ $10^{-3} \ M$ solution of detergent $(C_{12}H_{25}SO_4^-Na^+)$ forms a colloidal sol. In $1 \ mm^3$ of the solution,there are on average $10^{13}$ colloidal particles. How many ions are present in one colloidal particle (micelle)? $(N_A = 6 \times 10^{23})$

What is the difference between multimolecular and macromolecular colloids? Give one example of each. How are associated colloids different from these two types of colloids?