Which compound corresponds vant Hoff factor (i) to be equal to 2 in dilute solution:

Options

A. `K_(2)SO_(4)`
B. `NaHSO_(4)`
C. Sugar
D. `MgSO_(4)`

Answer

D

Explanation

`K_(2)SO_(4) rarr2K^(+) +SO_(4)^(--) `
`1-X` 2X X
`i = ( 1-x+x+x)/(1) =1+2X =3 ( :' X=1 )`
`NaHSO_(4) rarr Na^(+) + HSO_(4)^(-)` (Weak electrolyte ) `X cancel (=) 0`
`1-x` X X
Sugar `rarr` No ionisation
`MgSO_(4)rarr Mg^(++)+SO_(4)^(--)`
`( 1-X)` X X
`i =(1-X+X+X)/(1) =1+X=2 ( :' X=1)`