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If the molar conductivities ("in" S cm^(...

If the molar conductivities `("in" S cm^(2) "mol"^(-1))` of NaCl,KCl and NaOH at infinite dilution 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

Text Solution

Verified by Experts

The correct Answer is:
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`
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