Per NCERT's classification, MILK passed by laser light shows visible scattering of the beam — what does this tell us?
AMilk is a suspension that settles in seconds
BMilk is a colloid — large enough particles to scatter light but not so large as to settle quickly; this is the Tyndall effect
CMilk is a true solution like salt water
DMilk is a pure substance with single composition
Answer & Solution
Correct answer: B. Milk is a colloid — large enough particles to scatter light but not so large as to settle quickly; this is the Tyndall effect
Milk scatters light (Tyndall effect) showing it's a colloid — particles big enough to scatter but stable enough not to settle quickly (per NCERT Activity 5.1).
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