Verified Solution • 2025–26 Session moderate

QAIPM-2012-Ch-1626: NEET 2012 Chemistry - Class 12 AIPM-2012-Ch-1626 Solution: Molar conductivities (\( _m^ \)) at infinite dilution of NaCl…

Molar conductivities (Λm∘\Lambda_m^\circ) at infinite dilution of NaCl HCl and CH3COONaCH_3COONa are 126.4 425.9 and 91.0 S cm2 mol−191.0\ \text{S cm}^2\ mol^{-1} respectively. (Λm∘\Lambda_m^\circ) for CH3COOHCH_3COOH will be 425.5 S cm2 mol−1425.5\ \text{S cm}^2\ mol^{-1} 180.5 S cm2 mol−1180.5\ \text{S cm}^2\ mol^{-1} 290.8 S cm2 mol−1290.8\ \text{S cm}^2\ mol^{-1} 390.5 S cm2 mol−1390.5\ \text{S cm}^2\ mol^{-1}

Multiple Choice Options

  • A 425.5 S cm 2 mol −- _ 1
  • B 180.5 S cm 2 mol −- _ 1
  • C 290.8 S cm 2 mol −- _ 1
  • D 390.5 S cm 2 mol −- _ 1

Step-by-Step Verified Solution

_ o CH 3 COOH = _ o CH 3 COONa + _ o HCl - _ o NaCl = = 91 + 425.9 � 126.4 = 390.5

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