Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is

100? The conductivity of this solution is 1.29 S m^{- 1}. Resistance of the same cell when filled with

0.2 M of the same solution is 520 n. The molar conductivity of 0.2M solution of the electrolyte will

be

(1) 124 x 10-4 S m² mol^{- 1}

(2) 1240 x 10- 4 S m² mol^{- 1}

(3) 1.24 x 1 o-4 S m² mol^{- 1}

(4) 12.4 x 10- 4 S m² mol^{- 1}