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  4. For which of the following van't Hoff factor cannot be greater than unity?

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Q. For which of the following van't Hoff factor cannot be greater than unity?

NTA AbhyasNTA Abhyas 2020Solutions

Solution:

For urea $\left(\mathrm{NH}_2 \mathrm{CONH}_2\right)$ the van't Hoff factor can not be greater than unity because urea is non-ionisable while other are ionic compounds so will undergo dissociate in aqueous solution so van't Hoff factor will become more then unity.