Question
Calculate the molality of solution of nonvolatile solute if boiling point of solution, molal elevation constant for solvent are 319.8\ K and 2.5\ K kg mol ^ -1 respectively [Boiling point of solvent = 319.5\ K ]
MHT CET
Chemistry
Solutions
2026
MHT CET 2026 (18 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. 0.12\ mol kg ^ -1
- B. 0.14\ mol kg ^ -1
- C. 0.17\ mol kg ^ -1
- D. 0.21\ mol kg ^ -1
Answer
A. 0.12\ mol kg ^ -1
Step-by-step solution
Elevation in boiling point is given by T_b = T_b - T_b^ Substituting the given values: T_b = 319.8 - 319.5 = 0.3\ K The relation between elevation in boiling point and molality is T_b = K_b m Rearranging for molality m: m = T_b K_b m = 0.3 2.5 = 0.12\ mol kg ^ -1 Answer: 0.12\ mol kg ^ -1
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