Chemistry - Liquid Solution Question with Solution | TestHub

Key IdeaIsotonic solutions are those solutions which have same osmotic pressure at a given temperature.
Formula for osmotic pressure,$\pi =CRT$
Considering the set given in option$\left(\mathrm{d}\right),$i.e.$3.0g{L}^{-1}$urea and 17.1$g{L}^{-1}$sucrose. Given, molecular of sucrose 342$gmo{l}^{-1}.$
For urea,
Conc.C$=\frac{3}{60}=\frac{1}{20}$
Osmotic pressure${\pi }_1=\frac{1}{20}\times R\times T$
For sucrose conc.$C=\frac{17.1}{342}=\frac{1}{20}$
$\therefore$Osmotic pressure,${\pi }_2=\frac{1}{20}RT$
Thus, set of solution of urea and sucrose given in option$\left(\mathrm{d}\right)$is isotonic.