If the various terms in the following expressions have usual meanings, the van't Hoff factor 'i' cannot be calculated by which of the following expression ?

Options

A. `piV = sqrt("in")RT`
B. `DeltaT_f = iK_f. m`
C. `Delta T_b = iK_b.m`
D. `(P_("solvent")^@-P_("solution"))/(P_("solvent")^@) = i(n/(N + n))`

Answer

A

Explanation

Van.t Hoff equation is
`piV = "in"RT`
For depression in freezing point.
`DeltaT_f = ixxK_fxxm`
For elevation in boiling point.
`DeltaT_b =ixxK_bxxm`
For lowering of vapour pressure,
`(p_("solvent")^@- p_("solution")^@)/P_("solvent")^@=i(n/(N+n))`.