The freezing point of equimolal soution will be highest for :

Options

A. `C_(6)H_(5)NH_(3)Cl`
B. `Ca (NO_(3))_(2)`
C. `La(NO_(3))_(3)`
D. `C_(6)H_(12)O_(6)` (glucose)

Answer

D

Explanation

Depression in freeing point `alpha` is I
`Delta T_(f) alpha i`
Higher the I value, greater is the depression in freeing point, lower the freezing point of the solution and vice-versa
For `C_(5)H_(5)NH_(3)Cl,i=2`
for `Ca(NO_(3))_(2),i-3`
for `La(NO_(3))_(3)i=4`
for `C_(6)H_(2)O_(6),i=1`
Hence glucose solution will hae the highest freezing point.
Hence (D) is the correct answer.