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Question

A conductance cell was filled with 0.01 molar KCl. Its resistance was found to be 150 ohm at 25oC. The conductivity was observed to be 0.00177Scm1. The cell was when washed and filled with 0.05 molar solution of NaCl whose resistance was found to be 325 ohm. Conductivity of NaCl solution is:

A
6.189×104Scm1
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B
9.168×104Scm1
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C
8.169×104Scm1
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D
None of these
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Solution

The correct option is C 8.169×104Scm1
As we know,
cell constant = kR = conductivity*resistance
so,
150*0.00177 = 325*k
k=8.169104

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