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Point out whether the following statemen...

Point out whether the following statements are true or false :
(i) Particles in a colloidal solution can always be seen by naked eyes.
(ii) Scattering of light occurs when a beam of liquid is passed through aqueous sugar solution.
(iii) Colloidal solutions are of heterogeneous nature.
(iv) Digestion of food is a chemical change.

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(i) False (ii) False (iii) True (iv) True.
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