MCQ
For which among the following equimolar aqueous solutions, van't Hoff factor has the lowest value?
- A
- B
- C
- DUrea
✓
Answer
(d): Urea does not dissociate into ions, thus, its van't Hoff factor is 1 . Whereas, all others furnish ions.
$ \begin{aligned} & \mathrm{AlCl}_3 \longrightarrow \mathrm{Al}^{3+}+3 \mathrm{Cl}^{-} ; i=4 \\ & \mathrm{~K}_2 \mathrm{SO}_4 \longrightarrow 2 \mathrm{~K}^{+}+\mathrm{SO}_4^{2-} ; i=3 \\ & \mathrm{NH}_4 \mathrm{Cl} \longrightarrow \mathrm{NH}_4^{+}+\mathrm{Cl}^{-} ; i=2 \end{aligned} $
$ \begin{aligned} & \mathrm{AlCl}_3 \longrightarrow \mathrm{Al}^{3+}+3 \mathrm{Cl}^{-} ; i=4 \\ & \mathrm{~K}_2 \mathrm{SO}_4 \longrightarrow 2 \mathrm{~K}^{+}+\mathrm{SO}_4^{2-} ; i=3 \\ & \mathrm{NH}_4 \mathrm{Cl} \longrightarrow \mathrm{NH}_4^{+}+\mathrm{Cl}^{-} ; i=2 \end{aligned} $
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following is a trihydric alcohol?
The reaction used to convert toluene to benzaldehyde is known as :
Both aldehydes and ketones can react with
On passing 1.5 F charge, the number of moles of aluminium deposited at cathode are [Molar mass of Al = 27 gram $mol ^{-3}$]
→Which among the following colligative properties is useful to determine molar masses of very expensive solutes?
Which of the following is the least acidic compound ?
The concept of electrode potential is explained on the basis of
Inner complex has hybridisation,
Which of the following sugars can be used to prepare glucose on a large scale?
The increasing order of thermal stability of hydrides of sixteenth group elements is