SATHEE: Redox Reactions And Electrochemistry Ques 38

Redox Reactions And Electrochemistry Ques 38

Question: The molar conductances of $N a C l,, H C l$ and $C H_{3} C O O N a$ at infinite dilution are 126.45, 426.16 and $91, o h m^{- 1}, c m^{2}, m o l^{- 1}$ respectively. The molar conductance of $C H_{3} C O O H$ at infinite dilution is [CBSE PMT 1997]

Options:

A) $201.28, o h m^{- 1}, c m^{2}, m o l^{- 1}$

B) $390.71, o h m^{- 1} c m^{2}, m o l^{- 1}$

C) $698.28, o h m^{- 1}, c m^{2}, m o l^{- 1}$

D) $540.48, o h m^{- 1} c m^{2}, m o l^{- 1}$

Show Answer

Answer:

Correct Answer: B

Solution:

$\land_{m}^{o} (C H_{3} C O O H) =$ $\land^{o} (C H_{3} C O O N a)$ $+ \land^{o} (H C l) - \land^{o} (N a C l)$ $= 91 + 426.16 - 126.45 = 390.71 o h m^{- 1} c m^{2} m o l^{- 1}$ .

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Redox Reactions And Electrochemistry Ques 38

Question: The molar conductances of NaCl,,HCl and CH3COONa at infinite dilution are 126.45, 426.16 and 91,ohm−1,cm2,mol−1 respectively. The molar conductance of CH3COOH at infinite dilution is [CBSE PMT 1997]

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Question: The molar conductances of $N a C l,, H C l$ and $C H_{3} C O O N a$ at infinite dilution are 126.45, 426.16 and $91, o h m^{- 1}, c m^{2}, m o l^{- 1}$ respectively. The molar conductance of $C H_{3} C O O H$ at infinite dilution is [CBSE PMT 1997]