Chemistry - Liquid Solution Question with Solution | TestHub

Osmotic pressure: $\pi =iCRT$, so it depends on the Van't Hoff factor $i$.

Urea and glucose are non-electrolytes, which means $i=1$. Therefore, their ratio is $1$.

For electrolytes, the Van't Hoff factor $i$ varies: NaCl ($i\approx 2$), MgCl₂ ($i\approx 3$), Al₂(SO₄)₃ ($i\approx 5$), Na₃PO₄ ($i\approx 4$). Thus, the ratio depends on $i$.

Comparing glucose ($i=1$) with NaCl ($i\approx 2$), the ratio is $<1$.