JEE Main Chemistry question
Not in JEE Main or NEET syllabus
How many of the following are attributed to the Tyndall effect? 1. Electrophoresis 2. Formation of delta 3. Blue colour of the sky 4. Tanning of leather 5. Heterogeneous catalysis 6. Visible beam of headlights in fog
Answer: 2
Solution
The blue colour of the sky (item 3) and the visible beam of headlights in fog (item 6) both arise from the scattering of light by fine colloidal-sized particles, which is precisely the Tyndall effect. Electrophoresis (charge-driven particle movement), formation of a river delta (coagulation of clay
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