i) What is 'Tyndall effect'? ii) In th...

i) What is 'Tyndall effect'?
ii) In the coagulation of negative sol, arrange the following ions in ascending order of their flocculating power.
`Ba^(2+), Na^(+), Al^(3+)`

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i) Scattering of light by colloidal particles.
ii) `Na^(+) lt Ba^(2+) lt Al^(3+)`

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