AP EAMCET20226 Jul 2022Morning ShiftChemistrySolutionsActual
Which of the following solution has the highest freezing point?
Options
- A0.1 ~mol KCl in 1 ~kg water
- B0.1 ~mol ~K ₂ SO ₄ in 1 ~kg water
- C0.1 ~mol Urea in 1 ~kg water
- D30 ~g of glucose in 1 ~kg water
Correct answer
C. 0.1 ~mol Urea in 1 ~kg water
Step-by-step solution
Total no. of species will increases for the dissolution of strong electrohytes, KCl and K ₂ SO ₄ . KCl K ⁺+ Cl ⁻ ; K ₂ SO ₄ 2 ~K ⁺+ SO ₄²⁻ Therefore, depression in freezing point will be in greater extent than undissociated organic compounds like urea and glucose is they don't dissociate in aqueous solution. Now, 30 ~g of glucose = 30 180 = 4 6 =0.167 ~mol Therefore, no. of moles of solute of glucose is greater than that of urea of 1 ~kg water. So, depression ( T _ f ) in freezing point is more than that of urea. T