Which of the following solution will have highest freezing point?

Question

Which of the following solution will have highest freezing point? (A) 2 M NaCl solution (B) 1.5 M AlCl3 solution (C) 1 M Al2 (SO4)3 solution (D) 3 M Urea solution

Tardigrade Admin · Accepted Answer

Depression in freezing point propto molality × n For NaCl, Δ Tf propto 2× 2 For AlCl3, Δ Tf propto 4 × 1.5 For Al2(SO4)3 Δ Tf propto 5× 1 For Urea Δ Tf propto 3 × 1 Since, lowest depression is observed for solution containing urea, hence it will have highest freezing point

Q. Which of the following solution will have highest freezing point?

$2 M N a Cl$ solution

$1.5 M A lC l_{3}$ solution

$1 M A l_{2} (S O_{4})_{3}$ solution

$3 M$ Urea solution

Q. Which of the following solution will have highest freezing point?

2MNaCl solution

1.5MAlCl3​ solution

1MAl2​(SO4​)3​ solution

3M Urea solution

Depression in freezing point ∝ molality ×n For NaCl,ΔTf​∝2×2 For AlCl3​,ΔTf​∝4×1.5 For Al2​(SO4​)3​ΔTf​∝5×1 For Urea ΔTf​∝3×1 Since, lowest depression is observed for solution containing urea, hence it will have highest freezing point

$2 M N a Cl$ solution

$1.5 M A lC l_{3}$ solution

$1 M A l_{2} (S O_{4})_{3}$ solution

$3 M$ Urea solution