The paste resulting from gelatinization of starch is an example of a sol. The dispersed phase is ___

The paste resulting from gelatinization of starch is an example of a sol. The dispersed phase is ___

• A. Water
• B. Sugar
• C. Oil
• D. Starch

Answer: (D)

In a sol, solid particles are dispersed in a liquid. When starch gelatinizes, the starch granules swell and spread out in water, forming a colloidal suspension where the solid dispersed phase is the starch. Water acts as the continuous medium that surrounds and carries the dispersed starch particles. That’s why starch is the correct choice. Water isn’t the dispersed phase, sugar would dissolve rather than stay as dispersed particles, and oil would form a different type of mixture (an emulsion) rather than the starch sol described here.

In a sol, solid particles are dispersed in a liquid. When starch gelatinizes, the starch granules swell and spread out in water, forming a colloidal suspension where the solid dispersed phase is the starch. Water acts as the continuous medium that surrounds and carries the dispersed starch particles. That’s why starch is the correct choice. Water isn’t the dispersed phase, sugar would dissolve rather than stay as dispersed particles, and oil would form a different type of mixture (an emulsion) rather than the starch sol described here.