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Q.

The resistance offered by 0.1 M solution of acetic acid when placed in a conductivity cell of length 1.0 cm and area of cross section 3.0cm2 is found to be 7×103Ω. The molar conductivity of the solution is

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a

4.76Scm2mol1

b

4.76×104Scm2mol1

c

0.476Scm2mol1

d

4.76×103Scm2mol1

answer is C.

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Detailed Solution

κ=1RlA=17×103Ω1.0cm3.0cm2=4.76×105Scm1

Λ=κc=4.76×105Scm10.1moldm3=4.76×104Sdm3cm1mol1=4.76×104S(10cm)3cm1mol1=0.476Scm2mol1

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