Which of the following substances gives a positively charged sol?

Sodium stearate $CH_{3}(CH_{2})_{16}COO^{-}Na^{+}$ is an anionic surfactant which forms micelles in water. Choose the correct statement for it from the following:

Among the following electrolytes,which is the most effective coagulating agent for $Fe(OH)_3$ sol?

The conditions given below are in the context of observing Tyndall effect in colloidal solutions:
$A$. The diameter of the colloidal particles is comparable to the wavelength of light used.
$B$. The diameter of the colloidal particles is much smaller than the wavelength of light used.
$C$. The diameter of the colloidal particles is much larger than the wavelength of light used.
$D$. The refractive indices of the dispersed phase and the dispersion medium are comparable.
$E$. The dispersed phase has a very different refractive index from the dispersion medium.
Choose the most appropriate conditions from the options given below:

Which of the following statements is false?

When a strong beam of light is passed through a colloidal solution,the light will