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  4. Which of the following aqueous molal solution have highest freezing point?

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Q. Which of the following aqueous molal solution have highest freezing point?

Solutions

Solution:

$KBr = K ^{+}+ Br ^{-}=2$ ions

$BaCl _{2}= Ba ^{2+}+2 Cl ^{-}=3 $ ions

$Al \left( SO _{4}\right)_{3}=2 Al ^{3+}+3 SO _{4}^{2-}=5$ ions

So, urea is not ionized and hence, it is shows highest freezing point.