Question

Hemoglobin and gold sol are examples of
1. Negatively and positively charged sols, respectively
2. Negatively charged sols
3. Positively charged sols
4. Positively and negatively charged sols, respectively

Answer 1

Correct Answer - Option 4 : Positively and negatively charged sols, respectively

Concept:

Hemoglobin and gold sol both are colloids and always carry an electric charge. Hemoglobin is a positively charged sol, because in hemoglobin, Fe²⁺ ion is the central metal ion of the octahedral complex. All metal sols like, Au-sol, Ag-sol etc. are negatively charged sols.