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Q.

Give the correct order of initials T (true) or F (false) for following statements
I: Lyophobic sols are irreversible sols.
II: ${PO}_{4}^{3 -}$ ions have more coagulation value than ${SO}_{4}^{2 -}$ ions for coagulation of positive sols.
III: The values of the colligative properties observed experimentally are very small of colloidal sols

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a

FTT

b

TFT

c

TTT

d

TTF

answer is B.

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Detailed Solution

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Lyophobic sols are irreversible sols. Micelle formation taken place above Kraft temperature and ${PO}_{4}^{3 -}$ ion has less coagulation value than ${SO}_{4}^{2 -}$ as ${PO}_{4}^{3 -}$ ion has more negative charge so it has more coagulation power. No. of particles in colloidal sol is less so values of colligative properties will also be low.

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