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Conductance of Electrolytic Solution

Which of the ...

Question

Which of the following plot correctly represents the variation of concentration of a surfactant (e.g. sodium doedecyl sulphate) versus molar conductivity with regard to behavior at CMC?

A

a

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B

b

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C

c

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D

d

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Solution

The correct option is A a
The molar conductivity varies as shown in plot a). With increase in concentration below CMC, molar conductivity keeps on decreasing. After CMC, the decrease becomes steeper and a discontinuity is observed at CMC.

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