MHT CET20243 May 2024Morning ShiftChemistrySolutionsActual
Calculate the molar mass of nonvolatile solute when 1.5 g of it is dissolved in 90 g solvent decreases its freezing point by 0.25 K . [ K _ f =1.2 ~K ~kg ~mol ⁻¹ ]
Options
- A72 ~g ~mol ⁻¹
- B80 ~g ~mol ⁻¹
- C88 ~g ~mol ⁻¹
- D96 ~g ~mol ⁻¹
Correct answer
B. 80 ~g ~mol ⁻¹
Step-by-step solution
aligned & M ₂= 1000 ~K _ f W ₂ ~T _ b W _ i & = 1000 1.2 ~K ~kg ~mol ⁻¹ 1.5 ~g 0.25 ~K 90 ~g =80 ~g ~mol ⁻¹ aligned