For 1 molal aqueous solution of the following compounds, which one will show the highest freezing point ?

Options

A. `[Co(H_(2)O)_(6)]Cl_(3)`
B. `[Co(H_(2)O)_(5)Cl]Cl_(2).H_(2)O`
C. `[Co(H_(2)O)_(4)Cl_(2)]Cl.2H_(2)O`
D. `[Co(H_(2)O)_(3))Cl_(3)].3H_(2)O`

Answer

D

Explanation

As the value of i increases the freezing point decreases.
`{:("Aqueous solution",,i),([Co(H_(2)O)_(6)]Cl_(3),to,4),([Co(H_(2)O)_(5)Cl]Cl_(2).H_(2)O,to,3),([Co(H_(2)O)_(4)Cl_(2)]Cl.2H_(2)O,to,3),([Co(H_(2)O)_(3)Cl_(3)].3H_(2)O,to,1):}`