1.
At 25∘^\circC, the molar conductances at infinite dilution for the strong electrolytes NaOH, NaCl and BaCl2_2 are 248 ×\times 10−4^{-4}, 126 ×\times 10−4^{-4} and 280 ×\times 10−4^{-4} Sm2^2 mol−1^{-1} respectively. λm∘\lambda^\circ_m Ba(OH)2_2 in Sm2^2 mol−1^{-1} is: