Emulsifiers are generally

Gelatin is a protective colloid for which of the following?

Who introduced the concept of $Gold \ Number$?

The critical micelle concentration $(CMC)$ of a soap solution is $5 \times 10^{-4} \ mol \ L^{-1}$. Identify the correct statements about this solution.
$I$. The micelle is stable if the soap solution concentration is $10^{-7} \ mol \ L^{-1}$
$II$. The micelle is stable if the soap solution concentration is higher than $5 \times 10^{-4} \ mol \ L^{-1}$
$III$. Micelles are also known as associated colloids.

Colloidal solution of gold is prepared by .............

The charges on the colloidal $CdS$ sol and $TiO_2$ sol are,respectively :