solve 41.
41.  The molar ionic conductances at infinite dilution of Mg2+ and Cl​- are 106.1 and 76.3 ohm-1 cm2 mol​-1. respectively. The molar  conductance of  solution of MgCl 2  at infinte dilution is
a )   29 . 8   ohm - 1 cm 2 mol - 1 b )   183 . 4   ohm - 1 cm 2 mol - 1 c )   285 . 7 ohm - 1 cm 2 mol - 1 d ) 258 . 7   ohm - 1 cm 2 mol - 1
 

MgCl2 Mg2+ + 2 Cl-According to Kohlrausch law, λM (MgCl2)   =λM (Mg2+) +2 λM (Cl-)     = 106.1 + 2(76.3)     = 258.7 ohm-1cm2 mol-1

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Ç is correct
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Here, X infinity for for MgCl2 = X infinity for Mg + 2 X infinity for Cl. Where X refers to conductance at infinite dilution which are given On solving we get, X infinity for MgCl2 = 258.7
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