The molar conductance of NaCl, HCI, and CH₃COONa at infinite dilution are 126.45, 426.16, and 91.0 S cm mol^-1 respectively. The molar conductance of CH₃COOH at infinite dilution will be:

1. 698.28 S cm² mol^-1

2. 540.48 S cm² mol^-1

3. 201.28 S cm² mol^-1

4. 390.71 S cm² mol^-1

The molar conductivity of 0.007 M acetic acid is 20 S cm² mol^-1. The dissociation constant of acetic acid is -

(\(\mathrm{\Lambda_{H^{+}}^{o} \ = \ 350 \ S \ cm^{2} \ mol^{-1} }\))
(\(\mathrm{\mathrm{\Lambda_{CH_{3}COO^{-}}^{o} \ = \ 50 \ S \ cm^{2} \ mol^{-1} }}\))

1. $1.75\times {10}^{-5}$ mol L^-1 

2. $2.50\times {10}^{-5}$ mol L^-1 

3. $1.75\times {10}^{-4}$ mol L^-1 

4. $2.50\times {10}^{-4}$ mol L^-1 

Limiting molar conductivity of NH₄OH (i.e., ${\mathrm{\Lambda }}_{\mathrm{m}\left({\mathrm{NH}}_4\mathrm{OH}\right)}^0$ is equal to -

1. ${\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaOH}\right)}^0+{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaCl}\right)}^0-{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaOH}\right)}^0$

2. ${\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaOH}\right)}^0+{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaCl}\right)}^0-{\mathrm{\Lambda }}_{\mathrm{m}\left({\mathrm{NH}}_4\mathrm{Cl}\right)}^0$

3. ${\mathrm{\Lambda }}_{\mathrm{m}\left({\mathrm{NH}}_4\mathrm{OH}\right)}^0+{\mathrm{\Lambda }}_{\mathrm{m}\left({\mathrm{NH}}_4\mathrm{Cl}\right)}^0-{\mathrm{\Lambda }}_{\mathrm{m}\left(HCl\right)}^0$

4. ${\mathrm{\Lambda }}_{\mathrm{m}\left({\mathrm{NH}}_4\mathrm{Cl}\right)}^0+{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaOH}\right)}^0-{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaCl}\right)}^0$

Molar conductivities $(\wedge {°}_m)$ at infinite dilution of NaCl, HCl and $C{H}_{3}COONa$ are 126.4, 425.9 and 91.0 S cm² mol^-1 respectively. $(\wedge {°}_m)$  for $C{H}_{3}COOH$  will be:

1.  $180.5 S c{m}^{\mathrm{2 }}mo{l}^{-1}$

2.  $290.8 S c{m}^{\mathrm{2 }}mo{l}^{-1}$

3.  $390.5 S c{m}^{\mathrm{2 }}mo{l}^{-1}$

4.  $425.5 S c{m}^{\mathrm{2 }}mo{l}^{-1}$

The molar conductance of $\frac{\mathrm{M}}{32}$ solution of a weak monobasic acid is 8.0 ohm^-1 cm² and at infinite dilution is 400 ohm^-1 cm². The dissociation constant of this acid is : 

1. $1.25\times {10}^{-5}$

2. $1.25\times {10}^{-6}$

3. $6.25\times {10}^{-4}$

4. $1.25\times {10}^{-4}$

Kohlrausch's law states that at: