Figure explains elevation in boiling point when a non-volatile solute is added to a solvent. Variation of vapour pressure with temperaure and elevation in boiling point is marked.
Ratio of `DeltaT_(b)//K_(b)` of `6% AB_(2)` and `9% A_(2)B (AB_(2)` and `A_(2)B` both are non-electrolytes) is 1 mol/kg in both cases. Hence, atomic masses of A and B are respectively.
A. 60,90
B. 40,40
C. 40,10
D. 10,40
