The resistance of 0.5 M solution of an electrolyte in a conductivity cell was found to be 50 Ω. If the electrodes in the conductivity cell are 2.2 cm apart and have an area of 4.4 cm2 then the molar conductivity (in Sm2mol–1) of the solution is
A
0.2
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B
0.02
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C
0.002
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D
None of these
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Solution
The correct option is C 0.002 conductivity,K=G∗1R
where G∗ is the cell constant G∗=lA
where l is the distance between the electrodes and A is the area.