Which of the following forms a colloidal solution in water?
Which of the following forms a colloidal solution in water?
The correct option is A Starch
Explanation for correct option:
Option (A) Starch
Colloids: Colloids are heterogeneous mixtures in which a definite substance is distributed in the form of very small particles as a dispersed phase in another substance called the dispersion medium.
- The different types of colloids are aerosols, sols, foam as well as gels.
When starch is dissolved in water, it forms a macromolecular colloidal solution in which starch particles are dispersed in the water.
Explanation for incorrect options:
Option (B) Glucose is soluble in water. Glucose completely dissolves in water to form a true solution.
Option (C) Urea is soluble in water. So, urea dissolves completely in water to form a true solution.
Option (D) Barium sulphate is insoluble in water. So, when we add barium sulphate to water, it does not dissolve in water and forms a suspension.
Hence, the correct option is (A).
Starch
Explanation for correct option:
Option (A) Starch
Colloids: Colloids are heterogeneous mixtures in which a definite substance is distributed in the form of very small particles as a dispersed phase in another substance called the dispersion medium.
- The different types of colloids are aerosols, sols, foam as well as gels.
When starch is dissolved in water, it forms a macromolecular colloidal solution in which starch particles are dispersed in the water.
Explanation for incorrect options:
Option (B) Glucose is soluble in water. Glucose completely dissolves in water to form a true solution.
Option (C) Urea is soluble in water. So, urea dissolves completely in water to form a true solution.
Option (D) Barium sulphate is insoluble in water. So, when we add barium sulphate to water, it does not dissolve in water and forms a suspension.
Hence, the correct option is (A).
