Question

Which of the following aqueous solution has highest boiling
point, under identical condition having concentration 0.03 m?
(A) K 4[Fe(CN)6)
B) Na2so4,
(C) Urea
D) Nacl​

Answer 1

Answer:

the correct answer for this question is option (B) Na2SO4

Answer 2

The aqueous solution which has the highest boiling point, under identical conditions having a concentration of 0.03 m is (A) K 4[Fe(CN)6).

• The highest boiling point is determined by the formula of elevation in boiling point.
• A molecule that has a maximum value of i or Vant's Hoff factor will have a maximum boiling point.
• The molecule which on dissociation gives maximum species will have a maximum boiling point.
• K 4[Fe(CN)6) on dissociation gives 4K+ and one Fe(CN)6. so, the value of i is equal to 5.
• Similarly, Na2SO4 gives 3 ions, 2Na+ and 1 SO4 2-.
• Urea is non-polar so don't dissociate so its i is equal to 1.
• NaCl gives two ions on dissociation.
• Hence, K 4[Fe(CN)6) will have a maximum boiling point.