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Solutions of two electrolytes ‘A’ and ‘B’ are diluted. The Λm of ‘B’ increases 1.5 times while that of A increases 25 times. Which of the two is a strong electrolyte? Justify your answer. Graphically show the behavior of ‘A’ and ‘B’.


ƛm represents molar conductivity . It is the conducting power of ions due to one mole of electrolyte in a solution.

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A strong electrolyte would diffuse into ions at the first dissolution.

There would be no increase in the number of ions on dilution as strong electrolytes are completely dissociated.

Therefore, the 

Hence, ƛm would remain constant/change slowly on dilution.

B is a strong electrolyte .

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.