Q. 15 A4.5( 2 Votes )

Solutions of two

Answer :

‘B’ is strong electrolyte because on dilution of a strong electrolyte, number of ions almost remains the same. Only interionic attraction decreases and therefore increase in limiting molar conductivity of ‘B’ is small. Or we can say that,

On dilution for both strong and weak electrolyte, there is increase in molar conductivity.

But, it has been observed that there is a large increase in molar conductivity of weak electrolyte on dilution than strong electrolyte. Because, weak electrolyte dissociates very less at higher concentration.

On dilution, degree of dissociation of weak electrolyte increases means there is increase in number of ions per unit volume.

On the other hand, for strong electrolyte, degree of dissociation increases slowly on dilution.

Thus, ‘B’ whose limiting molar conductivity of ‘B’ increases 1.5 times is strong electrolyte.

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