Properties of Colloids — Prelims Questions

Which of the following properties is NOT exhibited by colloidal solutions?

For the coagulation of a negatively charged sol, the order of coagulating power of $Na^+$, $Ba^{2+}$, and $Al^{3+}$ ions is:

Which of the following phenomena is responsible for the blue colour of the sky?

Which of the following statements about electro-osmosis is correct?

A positive sol is coagulated by adding $K_2SO_4$, $K_3[Fe(CN)_6]$, $KCl$, and $K_4[Fe(CN)_6]$. The minimum concentration required for coagulation will be highest for:

Which of the following statements is INCORRECT regarding the stability of lyophobic colloids?