Which of the following electrolytes has the same value of van't Hoff factor (i)is that of `Al_(2)(SO_(4))_(3)`(if all are `100%`ionised?

Options

A. `Al(NO_(3))_(3)`
B. `K_(4)[Fe(CN)_(6)]`
C. `K_(2)SO_(4)`
D. `K_(3)[Fe(CN)_(6)]`

Answer

B

Explanation

For `Al_(2)(SO_(4))_(3) hArr 2Al^(3+) + 3SO_(4)^(2-) , i = 5`
Now `Al(NO_(3))_(3) to Al^(3+) + 3NO_(3)^(-) , i = 4`
`K_(4)[Fe(CN)_(6)] to 4K^(+) + [Fe(CN)_(6)]^(4-) , i= 5`
`K_(2)SO_(4) to 2K^(+) + SO_(4)^(2-) , i = 3`
`K_(2)SO_(4) to 2K^(+) + SO_(4)^(2-) , i = 3`
`K_(2)[Fe(CN)_(6)] to 3K^(+) + [Fe(CN)_(6)]^(3-) , i = 4`