Which of the following is NOT colloid solution?
- a- albumin 5%
- b- ringer`s solution
- c- dextran
- d- beta starch
- e- albumin 20%
examples of substances which form hydrophobic colloids in water are silver iodide, hydrated ferric oxide, sulfur, and gold. arsenous sulfide, aluminum chloride magnesium chloride.
The answer is b- ringer`s solution.
A colloid is a mixture in which small particles of one substance (the dispersed phase) are dispersed throughout another substance (the continuous phase). The dispersed phase particles in a colloid are typically in the range of 1 nanometer to 1 micrometer in size. Colloids are stable systems, meaning that the dispersed phase particles do not settle out of the continuous phase.
Ringer's solution is an electrolyte solution that is used to treat dehydration and electrolyte imbalance. It is a true solution, meaning that the solute particles are evenly distributed throughout the solvent. True solutions are not colloids.
The other options are all colloids:
- Albumin 5% is a solution of albumin, a protein that is found in the blood. Albumin is a colloid because the albumin molecules are dispersed throughout the water in the solution.
- Dextran is a polysaccharide that is used as a blood plasma expander. Dextran is a colloid because the dextran molecules are dispersed throughout the water in the solution.
- Beta starch is a polysaccharide that is used as a thickening agent. Beta starch is a colloid because the beta starch molecules are dispersed throughout the water in the solution.
- Albumin 20% is a solution of albumin, a protein that is found in the blood. Albumin is a colloid because the albumin molecules are dispersed throughout the water in the solution.
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