MHT CET202520 Apr 2025Evening ShiftChemistrySolutionsActual
Find the expected value of T _ b for 1 ~m ~Al~Cl ₃ solution in water if solution of nonelectrolyte of same concentration has T _ b value ' x ' K
Options
- Ax ~K
- B2 x ~K
- C3 x ~K
- D4 x ~K
Correct answer
D. 4 x ~K
Step-by-step solution
The elevation in boiling point for a 1 m nonelectrolyte solution is given as x K, indicating the molal boiling point elevation constant is K_ b = x . For AlCl ₃ , which completely dissociates into Al ³⁺ and 3 Cl ^- ions, the van't Hoff factor is i = 4 . The boiling point elevation for a 1 m AlCl ₃ solution is then given by T_ b = i K_ b m = 4 x 1 = 4x K. The expected value is D .