Question

Which of the following forms a colloidal solution in water ?

• A. NaCl
• B. Glucose
• C. Starch
• D. Barium nitrate

Answer 1

Answer: (C)

Starch

Answer 2

Starch molecules have colloidal dimensions whereas NaCl, glucose and ${Ba(NO_3)_2}$ are crystalloids and soluble in water.