The molar ionic conductances at infinite dilution of `Mg^(2+)` and `Cl^(-)` are 106.1 and `76.3 ohm^(-1) cm^(2)"mol"^(-1)` respectively. The molar conductance of solution of `MgCl_(2)` at infinite dilution is :

Options

A. `29.8 "ohm"^(-1)"cm"^(2)"mol"^(-1)`
B. `183.4 "ohm"^(-1)"cm"^(2)"mol"^(-1)`
C. `285.7 "ohm"^(-1)"cm"^(2)"mol"^(-1)`
D. `258.7 "ohm"^(-1)"cm"^(2)"mol"^(-1)`

Answer

D

Explanation

`Lambda^(prop)(MgCl_(2))=""^(prop)(Mg^(2+))+2lambda^(prop)(Cl^(-))`
`=106.1+2xx76.3=258.7`