Which onc of the following salts will have the same value of van't Hoff factor (i) as that of `K_(4)[Fe(CN)_(6)].`

Options

A. `Al_(2)(SO_(4))_(3)`
B. `NaCl`
C. `AL(NO_(3)) _(3)`
D. `Na_(2) SO_(4)`

Answer

A

Explanation

`K _(4)[Fe(CN) _(6)] and Al _(2) (SO _(4)) _(3)` both dissociates to give 5 ions or `i=5`
`K_(4)[Fe(CN)_(6)] hArr 4K^(+) + [Fe (CN)_(6) ] ^(4-)`
and ` Al_(2) (SO_(4)) _(3) hArr 2Al ^(3**) . 2SO _(4) `