Question

If the molar conductivities `("in" S cm^(2) "mol"^(-1))` of NaCl,Kci and NaOH at infinite diluation are 126, 150 and 250 respectively, the molar conductivity of KOH `("in" S "cm"^(2) "mol"^(-1))` is -
A. 256
B. 226
C. 26
D. 274

Answer 1

Correct Answer - D
`underline({:(126=lambda_(Na^(+))^(oo),+lambda_(Cl^(-))^(oo)),(150=lambda_(K^(+))^(oo),+lambda_(Cl^(-))^(oo)),(250=lambda_(Na^(+))^(oo),+lambda_(OH^(-))^(oo)):})`
`(150+250-126)=lambda_(K^(+))^(oo)+lambda_(OH^(-))^(oo)`
`or lambda_(KOH)^(oo)=274`