Vanishing cream and milk are which type of examples of emulsions?

Gold number is related with

Which one of the following statements is not correct?

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:

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

The apparatus used for the precipitation of carbon particles from smoke is known as.............