Consider the two solutions:
I: `0.5 M NaCl` aqueous solution at `25^(@)C`,
`NaCl` is complete ionized.
II:`2.0 M C_(6)H_(5)COOH` in benzene at `25^(@)C`,
`C_(6)H_(5)COOH` dimerizes to the full extent.
Which of the following statements(s) is (are) correct?

Options

A. Both the solution display equal osmotic pressure
B. Both solutions have equal vapour pressure
C. Solutions II is hypertonic
D. Solutions II has greater depression of freezing point than the solution I

Explanation

`NaCl:0,5M(i=2)" "implies" "C_("effective")=0.5xx2=1M`
`C_(6)H_(5)COOH:2.0M(i=1/2)" "implies" "C_("effective")=2xx1/2=1M`
(A)`pi=C_("effective")RTimpliespiimpliespi` is same as `C_("effective")` is same.
(B) Since both the solutions have different solvents, vapour pressure is not same
(C) Solutions are isotonic
(D) `DeltaT_(f)=iK_(f).mimpliesDeltaT_(f)` for solution II will be more as `K_(f)` (benzene) `gtK_(f)` (water)