Which one of the following in the ratio of the lowering of V.P. of 0.1 M aqueous solution of `BaCl_(2)`,NaCl and `Al_(2)(SO_(4)_(4)` respectively?

Options

A. `2 : 3 : 5 `
B. `3 : 2 : 5 `
C. `5 : 2 : 3 `
D. `5 : 1 : 2 `

Answer

B

Explanation

`BaCl_(2) rarr Ba^(2+) + 2CI^(-)(3 "ions")`
`NaCl rarr Na^(+) + CI^(-) (2 "ions")`
`Al_(2)(SO_(4))_(3) rarr 2Al^(3+) + 3SO_(4)^(2-) (5"ions")`
lowering of V.P. ratio = 3 : 2 : 5 respectively as lowering of V.P.