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Q.

The molar conductances of HC(NaC  and CH3 COONa are 426,126 and 91Ω-1cm-1mol-1 respectively. The molar conductance for CH3 COOH is

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a

261Ω1cm2mol-1

b

561Ω1cm2mol-1

c

612Ω1cm2mol-1

d

391Ω1cm2mol-1

answer is B.

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Detailed Solution

Given,

The molar Conductances of  HC,NaC and CH3COONa are 426, 126 and 91Ω1cm2mol-1 respectively.

The molar conductance for CH3COOH=?

Applying Kohlrausch law,

oCH3COOH=oCH3COONa+oHCloNaCl

=91+426126

=391Ω1cm2mol-1

 

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