MHT CET202619 April 2026Morning ShiftChemistrySolutionsActual
Which among the following pairs of solutions is isotonic in nature?
Options
- A0.1 M urea and 0.1 M sucrose
- B0.1 M urea and 0.1 M KCl
- C0.1 M sucrose and 0.1 M KCl
- D0.1 M KCl and 0.1 M CaCl ₂
Correct answer
A. 0.1 M urea and 0.1 M sucrose
Step-by-step solution
Isotonic solutions are those which have the same osmotic pressure at a given temperature. Osmotic pressure is given by = iCRT , where i is the van't Hoff factor, C is the molar concentration, R is the gas constant, and T is the temperature. For two solutions to be isotonic, their effective concentrations must be equal: i₁C₁ = i₂C₂ . For 0.1 M urea and 0.1 M sucrose: Urea is a non-electrolyte, so i = 1 . Effective concentration = 1 0.1 = 0.1 M. Sucrose is a non-electrolyte, so i = 1 . Effective concentration = 1 0.1