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Model Paper 5 — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceModel Paper 51 Mark
MCQ
The substance which does not form a true solution in water is:
  • A
    alum
  • ✓
    egg albumin
  • C
    common salt
  • D
    sugar
✓

Answer

Correct option: B.
egg albumin
Egg albumin has a particle size of the order $10^{-9}$ to $10^{-12}$ i.e. of the order of colloidal size. Due to which it is not able to form a clear solution in water and results into a colloidal solution.

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