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Which of the given solutions have an equal value of molar conductivity and equivalent conductivity?

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in Chemistry – Class 12 by (188k points)
Which of the given solutions have an equal value of molar conductivity and equivalent conductivity?

(a) 1M BaSO4

(b) 1M KCl

(c) 1M BCl3

(d) 1M CaSO4

This question was addressed to me during an online interview.

My question is from Conductance of Electrolytic Solutions topic in chapter Electrochemistry of Chemistry – Class 12

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Right choice is (b) 1M KCl

To explain I would say: We know that for electrolytic solutions, ⋀M = ⋀E × valency factor

Where ⋀M = molar conductivity and ⋀E = equivalent conductivity

For KCl, the valency factor is 1. Therefore, for KCl, the value of molar conductivity is equal to its equivalent conductivity. For other ions, ⋀M > ⋀E as their valency factors are > 1.

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