vinegar is _________ solution but milk is ___________ solution

True solution

• Solution which contains less than 1 nm sized particles dissoved in the medium
• We can not see the particles with our naked eye
• It doesn't undergo sedimentation when left undisturbed
• Example: sugar solution
• Vinegar which is a solution of vinegar and water also belongs to this category

Colloids

• These are type of substances in which 1-1000 nm sized particles are dispersed in the medium
• It doesn't undergo sedimentation when left undisturbed
• Colloids show an important phenomenon called Tyndall effect

Tyndall effect

• When the light passed through the colloidal solution, path of light becom visible due to scattering of light by the dispersed particles
• Milk belongs to the category of colloids where the dispersed phase and dispersion medium are liquids. i.e fat globules are dispersed in water medium

Conclusion: vinegar is true solution but milk is colloidal solution