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  • The resistance of conductivity cell filled with <img alt="0.02 \mathrm{~N} \mathrm{KCl}" src="https://entrancecorner.oncodecogs.com/gif.latex?0.02%20%5Cmathrm%7B%7EN%7D%20%5Cmathrm%7BKCl%7D" /

The resistance of conductivity cell filled with 0.02 \mathrm{~N} \mathrm{KCl}  at  25^{\circ} \mathrm{C}  was found to be 550 \mathrm{\Omega}  The specific conductance of0.02 \mathrm{~N} \mathrm{KCl}  at  25^{\circ} \mathrm{C}  is  1.62 \times 10^{-3} \Omega  The resistance of same cell filled with 0.2 \mathrm{~N}  \mathrm{Zn} \mathrm{SO_4}  at  \mathrm{25%}  was found to be \mathrm{72 \Omega} Calculate  equivalent

Option: 1

24


Option: 2

61


Option: 3

74


Option: 4

72


Answers (1)

best_answer

\mathrm{\Lambda_m=\frac{k \times 1000}{M}=\frac{1}{R} \times \frac{1}{A} \times \frac{1000}{M} \\ }

\mathrm{\frac{l}{A}=1.62 \times 10^{-3} \times 550 }

\mathrm{ \Lambda_m=\frac{1}{72} \times 1.62 \times 10^{-3} \times 550 \times \frac{1000}{0.2} \\ }

\mathrm{ \Lambda_m=61 \Omega^{-1} \mathrm{~cm}^{-1} \mathrm{eq}^{-1} }.

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