04. Conductance and Conductor
ELECTROCHEMISTRY

276199 Resistance of $0.2 \mathrm{M}$ solution of an electrolyte is $50 \Omega$. The specific conductance of the solution is $1.3 \mathrm{~S} \mathrm{~m}^{-1}$. If resistance of the $0.4 \mathrm{M}$ solution of the same electrolyte is $260 \Omega$, its molar conductivity is

1 $6250 \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
2 $6.25 \times 10^{-4} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
3 $625 \times 10^{-4} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
4 $62.5 \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276209 The resistance of $1 \mathrm{~N}$ solution of acetic acid is $250 \Omega$, when measured in a cell having a cell constant of $1.15 \mathrm{~cm}^{-1}$. The equivalent conductance (in $\Omega^{-1} \mathrm{~cm}^{2}$ equiv $^{-1}$ ) of $1 \mathrm{~N}$ acetic acid is

1 2.3
2 4.6
3 9.2
4 18.4
ELECTROCHEMISTRY

276212 A weak electrolyte having the limiting equivalent conductance of $400 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~g} \mathrm{equiv}^{-1}$ at $298 \mathrm{~K}$ is $2 \%$ ionized in its $0.1 \mathrm{~N}$ solution. The resistance of this solution (in ohm) in an electrolytic cell of cell constant $0.4 \mathrm{~cm}^{-1}$ at this temperature is

1 200
2 300
3 400
4 500
5 600
ELECTROCHEMISTRY

276213 The values of limiting ionic conductance of $\mathbf{H}^{+}$ and $\mathrm{HCOO}^{-}$ions are respectively 347 and $53 \mathrm{~S}$ $\mathrm{cm}^{2} \mathrm{~mol}^{-1}$ the dissociation constant of methanoic acid at $298 \mathrm{~K}$ is

1 $1 \times 10^{-5}$
2 $2 \times 10^{-5}$
3 $1.5 \times 10^{-4}$
4 $2.5 \times 10^{-5}$
5 $2.5 \times 10^{-4}$
ELECTROCHEMISTRY

276216 At $25{ }^{\circ} \mathrm{C}$ molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is $9.54 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$ and at infinite dilution its molar conductance is $238 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is

1 $4.008 \%$
2 $40.800 \%$
3 $2.080 \%$
4 $20.800 \%$
ELECTROCHEMISTRY

276199 Resistance of $0.2 \mathrm{M}$ solution of an electrolyte is $50 \Omega$. The specific conductance of the solution is $1.3 \mathrm{~S} \mathrm{~m}^{-1}$. If resistance of the $0.4 \mathrm{M}$ solution of the same electrolyte is $260 \Omega$, its molar conductivity is

1 $6250 \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
2 $6.25 \times 10^{-4} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
3 $625 \times 10^{-4} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
4 $62.5 \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276209 The resistance of $1 \mathrm{~N}$ solution of acetic acid is $250 \Omega$, when measured in a cell having a cell constant of $1.15 \mathrm{~cm}^{-1}$. The equivalent conductance (in $\Omega^{-1} \mathrm{~cm}^{2}$ equiv $^{-1}$ ) of $1 \mathrm{~N}$ acetic acid is

1 2.3
2 4.6
3 9.2
4 18.4
ELECTROCHEMISTRY

276212 A weak electrolyte having the limiting equivalent conductance of $400 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~g} \mathrm{equiv}^{-1}$ at $298 \mathrm{~K}$ is $2 \%$ ionized in its $0.1 \mathrm{~N}$ solution. The resistance of this solution (in ohm) in an electrolytic cell of cell constant $0.4 \mathrm{~cm}^{-1}$ at this temperature is

1 200
2 300
3 400
4 500
5 600
ELECTROCHEMISTRY

276213 The values of limiting ionic conductance of $\mathbf{H}^{+}$ and $\mathrm{HCOO}^{-}$ions are respectively 347 and $53 \mathrm{~S}$ $\mathrm{cm}^{2} \mathrm{~mol}^{-1}$ the dissociation constant of methanoic acid at $298 \mathrm{~K}$ is

1 $1 \times 10^{-5}$
2 $2 \times 10^{-5}$
3 $1.5 \times 10^{-4}$
4 $2.5 \times 10^{-5}$
5 $2.5 \times 10^{-4}$
ELECTROCHEMISTRY

276216 At $25{ }^{\circ} \mathrm{C}$ molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is $9.54 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$ and at infinite dilution its molar conductance is $238 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is

1 $4.008 \%$
2 $40.800 \%$
3 $2.080 \%$
4 $20.800 \%$
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ELECTROCHEMISTRY

276199 Resistance of $0.2 \mathrm{M}$ solution of an electrolyte is $50 \Omega$. The specific conductance of the solution is $1.3 \mathrm{~S} \mathrm{~m}^{-1}$. If resistance of the $0.4 \mathrm{M}$ solution of the same electrolyte is $260 \Omega$, its molar conductivity is

1 $6250 \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
2 $6.25 \times 10^{-4} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
3 $625 \times 10^{-4} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
4 $62.5 \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276209 The resistance of $1 \mathrm{~N}$ solution of acetic acid is $250 \Omega$, when measured in a cell having a cell constant of $1.15 \mathrm{~cm}^{-1}$. The equivalent conductance (in $\Omega^{-1} \mathrm{~cm}^{2}$ equiv $^{-1}$ ) of $1 \mathrm{~N}$ acetic acid is

1 2.3
2 4.6
3 9.2
4 18.4
ELECTROCHEMISTRY

276212 A weak electrolyte having the limiting equivalent conductance of $400 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~g} \mathrm{equiv}^{-1}$ at $298 \mathrm{~K}$ is $2 \%$ ionized in its $0.1 \mathrm{~N}$ solution. The resistance of this solution (in ohm) in an electrolytic cell of cell constant $0.4 \mathrm{~cm}^{-1}$ at this temperature is

1 200
2 300
3 400
4 500
5 600
ELECTROCHEMISTRY

276213 The values of limiting ionic conductance of $\mathbf{H}^{+}$ and $\mathrm{HCOO}^{-}$ions are respectively 347 and $53 \mathrm{~S}$ $\mathrm{cm}^{2} \mathrm{~mol}^{-1}$ the dissociation constant of methanoic acid at $298 \mathrm{~K}$ is

1 $1 \times 10^{-5}$
2 $2 \times 10^{-5}$
3 $1.5 \times 10^{-4}$
4 $2.5 \times 10^{-5}$
5 $2.5 \times 10^{-4}$
ELECTROCHEMISTRY

276216 At $25{ }^{\circ} \mathrm{C}$ molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is $9.54 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$ and at infinite dilution its molar conductance is $238 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is

1 $4.008 \%$
2 $40.800 \%$
3 $2.080 \%$
4 $20.800 \%$
ELECTROCHEMISTRY

276199 Resistance of $0.2 \mathrm{M}$ solution of an electrolyte is $50 \Omega$. The specific conductance of the solution is $1.3 \mathrm{~S} \mathrm{~m}^{-1}$. If resistance of the $0.4 \mathrm{M}$ solution of the same electrolyte is $260 \Omega$, its molar conductivity is

1 $6250 \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
2 $6.25 \times 10^{-4} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
3 $625 \times 10^{-4} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
4 $62.5 \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276209 The resistance of $1 \mathrm{~N}$ solution of acetic acid is $250 \Omega$, when measured in a cell having a cell constant of $1.15 \mathrm{~cm}^{-1}$. The equivalent conductance (in $\Omega^{-1} \mathrm{~cm}^{2}$ equiv $^{-1}$ ) of $1 \mathrm{~N}$ acetic acid is

1 2.3
2 4.6
3 9.2
4 18.4
ELECTROCHEMISTRY

276212 A weak electrolyte having the limiting equivalent conductance of $400 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~g} \mathrm{equiv}^{-1}$ at $298 \mathrm{~K}$ is $2 \%$ ionized in its $0.1 \mathrm{~N}$ solution. The resistance of this solution (in ohm) in an electrolytic cell of cell constant $0.4 \mathrm{~cm}^{-1}$ at this temperature is

1 200
2 300
3 400
4 500
5 600
ELECTROCHEMISTRY

276213 The values of limiting ionic conductance of $\mathbf{H}^{+}$ and $\mathrm{HCOO}^{-}$ions are respectively 347 and $53 \mathrm{~S}$ $\mathrm{cm}^{2} \mathrm{~mol}^{-1}$ the dissociation constant of methanoic acid at $298 \mathrm{~K}$ is

1 $1 \times 10^{-5}$
2 $2 \times 10^{-5}$
3 $1.5 \times 10^{-4}$
4 $2.5 \times 10^{-5}$
5 $2.5 \times 10^{-4}$
ELECTROCHEMISTRY

276216 At $25{ }^{\circ} \mathrm{C}$ molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is $9.54 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$ and at infinite dilution its molar conductance is $238 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is

1 $4.008 \%$
2 $40.800 \%$
3 $2.080 \%$
4 $20.800 \%$
ELECTROCHEMISTRY

276199 Resistance of $0.2 \mathrm{M}$ solution of an electrolyte is $50 \Omega$. The specific conductance of the solution is $1.3 \mathrm{~S} \mathrm{~m}^{-1}$. If resistance of the $0.4 \mathrm{M}$ solution of the same electrolyte is $260 \Omega$, its molar conductivity is

1 $6250 \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
2 $6.25 \times 10^{-4} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
3 $625 \times 10^{-4} \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
4 $62.5 \mathrm{~S} \mathrm{~m}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276209 The resistance of $1 \mathrm{~N}$ solution of acetic acid is $250 \Omega$, when measured in a cell having a cell constant of $1.15 \mathrm{~cm}^{-1}$. The equivalent conductance (in $\Omega^{-1} \mathrm{~cm}^{2}$ equiv $^{-1}$ ) of $1 \mathrm{~N}$ acetic acid is

1 2.3
2 4.6
3 9.2
4 18.4
ELECTROCHEMISTRY

276212 A weak electrolyte having the limiting equivalent conductance of $400 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~g} \mathrm{equiv}^{-1}$ at $298 \mathrm{~K}$ is $2 \%$ ionized in its $0.1 \mathrm{~N}$ solution. The resistance of this solution (in ohm) in an electrolytic cell of cell constant $0.4 \mathrm{~cm}^{-1}$ at this temperature is

1 200
2 300
3 400
4 500
5 600
ELECTROCHEMISTRY

276213 The values of limiting ionic conductance of $\mathbf{H}^{+}$ and $\mathrm{HCOO}^{-}$ions are respectively 347 and $53 \mathrm{~S}$ $\mathrm{cm}^{2} \mathrm{~mol}^{-1}$ the dissociation constant of methanoic acid at $298 \mathrm{~K}$ is

1 $1 \times 10^{-5}$
2 $2 \times 10^{-5}$
3 $1.5 \times 10^{-4}$
4 $2.5 \times 10^{-5}$
5 $2.5 \times 10^{-4}$
ELECTROCHEMISTRY

276216 At $25{ }^{\circ} \mathrm{C}$ molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is $9.54 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$ and at infinite dilution its molar conductance is $238 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is

1 $4.008 \%$
2 $40.800 \%$
3 $2.080 \%$
4 $20.800 \%$