The elevation in boiling point of a solution `dT_(b)` is related with molality of solution `(m)` by the reaction:
`dT_(b)=[(RT_(b)^(2))/(DeltaH_(vap))][(M_(1))/(1+mM_(1))]`, where `M_(1)` is moalr mass of solvent and `DeltaH_(vap)` is heat of vaporisation of solvent. For a dilute solution, the relation `((delT_(b))/(delT_(n)))_(mto0)`
gives:

Options

A. Molal ebullioscopic constant
B. Elevation in boiling point
C. Boiling point of solvent
D. Elevation in boiling point `(DeltaT_(b))` becomes more predominant

Answer

A