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Ionic conductance at infinite dilution of \( \mathrm{A} 1^{3+} \) and \( \mathrm{SO}_{4}{ }^{2-} \) ions are 60 and \( 80 \Omega^{-1} \mathrm{~cm}^{2} \mathrm{eq}^{-1} \), respectively. The correct detail(s) regarding \( \mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3} \) is/are
(a) the molar conductance is \( 140 \Omega^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1} \).
(b) the equivalent conductance is \( 140 \Omega^{-1} \mathrm{~cm}^{2} \mathrm{eq}^{-1} \).
(c) the molar conductance is \( 840 \Omega^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1} \).
(d) the molar conductance is \( 23.33 \Omega^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1} \).
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