Question

Gold sol in not a :

• A. Macromolecular colloid
• B. Lyophobic colloid
• C. Multimolecular colloid
• D. Negatively charged colloid

Answer 1

The Correct Option is A

• Gold sol is a colloid of gold particles in a liquid, which is a type of dispersed phase. It consists of gold particles that are quite small in size, typically in the range of nanometers.
• Macromolecular colloids are made up of very large molecules, such as proteins or starch, which are not the case for gold sol, so option (A) is incorrect.
• Lyophobic colloids are colloids where the dispersed phase (gold particles in this case) does not interact strongly with the dispersion medium. Gold sol is lyophobic because the gold particles do not form stable bonds with the solvent (typically water).
• Multimolecular colloids are formed by the aggregation of many small molecules or atoms. Gold sol is a multimolecular colloid because the gold particles are clusters of several gold atoms.
• Negatively charged colloids: Gold sol has negatively charged gold particles suspended in the solution, so option (D) is correct.

Thus, gold sol is not a macromolecular colloid, making option (A) the correct answer.

Answer 2

Gold sol is a multimolecular colloid where gold atoms are dispersed in a liquid medium. It is not a macromolecular colloid, which consists of large molecules like proteins or polymers.