Λm° for NaCl, HCl and NaA are given... | Electrochemistry | JEE Main 2019

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JEE MAIN 2019

12-01-2019 S2

Question

$\wedge_{\mathrm{m}}^{\circ}$ for $\mathrm{NaCl}, \mathrm{HCl}$ and NaA are $126.4,425.9$ and $100.5 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$, respectively. If the conductivity of 0.001 M HA is $5 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$, degree of dissociation of HA is

Select the correct option:

A

0.25

B

0.125

C

0.50

D

0.75

✓ Correct! Well done.

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