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Is Matter Around Us Pure ? — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure ?4 Marks
Question
How are sol, solution and suspension different from each other?
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Answer

Property Sol Solution Suspension
Nature Heterogenous Homogenous Heterogenous
Particle size 10-7-10-5cm Less than 1nm More than 100nm
Stability Quite stable Very stable Unstable
Tyndall effect yes no yes/no
Appearance Generally clear clear opaque
visibility Visible with an ultra microscope Not visible Visible with naked eye
Diffusion Diffuses very slowly Diffuses rapidly Do not diffuse
Settling Get settled in centrifugation Do not settle Settle on their own
Example Milk, blood, smoke Salt and sugar in water Sand in water, dusty air

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