Question

Name two positively and two negatively charged so/s​

Answer 1

Explanation:

upon the nature of charge on the particles of the dispersed phase, the colloidal solutions are classified into positively charged and negatively charged colloids. Some typical examples are as follows:

(a) Negatively charged colloids (b) Positively charged colloids

• Metal sulphides: As2S3, CdS • Metal hydroxides: Al(OH)3, Fe(OH)3

• Metal dispersions: Ag, Au, Pt • Metal oxide: TiO2

• Sulphur sol • Basic dyes: Methylene blue

• Sols of starch, gums, gold, gelatin etc. • Haemoglobin