Hemoglobin and gold sol are example of:
Option (A): Positively charged sols.
Option (B): Negatively charged sols.
Option (C): Negatively and positively charged sols respectively.
Option (D): Positively and negatively charged sol respectively. (Correct)
As we all knows that,
Multi-molecular Colloids –
“On dissolution, a large number of atoms or smaller molecules of a substance aggregate together to form species having size in the colloidal range (less than 1 nm). The species thus formed are called multi-molecular colloids. E.g. Gold sol, sulphur sol.”
So the correct answer is (D) – Positively and negatively charged sol respectively.