Paper: CSIR-NET June 2013 · Subject: Physical Chemistry · Chapter: Electrochemistry · Topic: Conductance · Marks: 2 · Difficulty: Medium
If the concentration (c) is increased to 4 times its original value (c), the change in molar conductivity for strong electrolytes is (where b is Kohlrausch constant)
(a)0
(b)$\mathrm{b} \sqrt{\mathrm{c}}$
(c)$2 \mathrm{b} \sqrt{\mathrm{c}}$
(d)$4 b \sqrt{c}$
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
Λ = Λ° − b√c; at 4c: Λ° − 2b√c. The change is −b√c (a decrease of b√c).