Question

For which among the following equimolar aqueous solutions Van't Hoff factor has the lowest value?

• A. Aluminium Chloride
• B. Potassium Sulphate
• C. Ammonium Chloride
• D. Urea

Answer 1

The correct option is D Urea

For the aqueous solution of urea, van't Hoff factor has the lowest value.

Urea is non-electrolyte and does not dissociate in aqueous solution. Hence, Van't Hoff factor is $1.$

For aluminium chloride $AlC{l}_3$, $i=4$

$AlC{l}_3\to A{l}^{3+}+3C{l}^{-}$

For potassium sulphate $K_{2}S{O}_4$, $i=3$

$K_{2}S{O}_4\to 2K^{+}+S{O}_4^{2-}$