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Question

The molar conductivity of 0.04 M solution of MgCl2 is 200 Scm2mol1 at 298 K. A cell with electrodes that are 2.0 cm2 in surface area and 0.50 cm apart is filled with MgCl2 solution.
Specific conductance of MgCl2 solution is:
[1 Mark]

A
8×103 Scm1
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B
5×103 Scm1
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C
0.03 Scm1
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D
0.08 Scm1
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Solution

The correct option is A 8×103 Scm1
Given,
The concentration of the solution (C)=0.04 M
Molar conductance (Λm)=200 Scm2mol1

Specific conductance (κ)=Λm×C1000
κ=200×0.041000
=8×103Scm1



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