04. Conductance and Conductor
ELECTROCHEMISTRY

276151 The specific conductivity of $0.1 \mathrm{~N} \mathrm{KCl}$ solution is $0.0129 \mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$. The resistance of the solution in the cell is $100 \mathrm{ohm}$. The cell constant of the cell will be :

1 0.56
2 2.80
3 1.10
4 1.29
ELECTROCHEMISTRY

276152 The resistance of $\frac{1}{10} M$ solution is $2.5 \times 10^{3} \mathrm{ohm}$.
What is the molar conductivity of solution? (cell constant $=1.25 \mathrm{~cm}^{-1}$ )

1 $3.5 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
2 $5.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
3 $2.5 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
4 $2.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276154 Consider the statements $S_{1}$ and $S_{2}$ :
$S_{1}$ : Conductivity always increases with decrease in the concentration of electrolyte.
$S_{2}$ : Molar conductivity always increase with decrease in the concentration of electrolyte. The correct option among the following is

1 $S_{1}$ is correct and $S_{2}$ is wrong
2 $\mathrm{S}_{1}$ is wrong and $\mathrm{S}_{2}$ is correct
3 Both $S_{1}$ and $S_{2}$ are wrong
4 Both $\mathrm{S}_{1}$ and $\mathrm{S}_{2}$ are correct
ELECTROCHEMISTRY

276156 $\Lambda_{\mathrm{m}}^{\mathrm{o}}$ for $\mathrm{NaCl}, \mathrm{HCl}$ and $\mathrm{NaA}$ are 126.4, 425.9 and $100.5 \mathrm{~S} \mathrm{~cm} \mathrm{~mol}^{-1}$, respectively. If the conductivity of $0.001 \mathrm{M} \mathrm{HA}$ is $5 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$, degree of dissociation of $\mathrm{HA}$ is

1 0.25
2 0.50
3 0.75
4 0.125
ELECTROCHEMISTRY

276157 The decreasing order of electrical conductivity of the following aqueous solution is
0.1 M formic acid (A),
$0.1 \mathrm{M}$ acetic acid (B),
0.1 M benzoic acid (C).

1 $\mathrm{A}>\mathrm{C}>\mathrm{B}$
2 $\mathrm{C}>\mathrm{B}>\mathrm{A}$
3 $\mathrm{A}>\mathrm{B}>\mathrm{C}$
4 $\mathrm{C}>\mathrm{A}>\mathrm{B}$
ELECTROCHEMISTRY

276151 The specific conductivity of $0.1 \mathrm{~N} \mathrm{KCl}$ solution is $0.0129 \mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$. The resistance of the solution in the cell is $100 \mathrm{ohm}$. The cell constant of the cell will be :

1 0.56
2 2.80
3 1.10
4 1.29
ELECTROCHEMISTRY

276152 The resistance of $\frac{1}{10} M$ solution is $2.5 \times 10^{3} \mathrm{ohm}$.
What is the molar conductivity of solution? (cell constant $=1.25 \mathrm{~cm}^{-1}$ )

1 $3.5 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
2 $5.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
3 $2.5 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
4 $2.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276154 Consider the statements $S_{1}$ and $S_{2}$ :
$S_{1}$ : Conductivity always increases with decrease in the concentration of electrolyte.
$S_{2}$ : Molar conductivity always increase with decrease in the concentration of electrolyte. The correct option among the following is

1 $S_{1}$ is correct and $S_{2}$ is wrong
2 $\mathrm{S}_{1}$ is wrong and $\mathrm{S}_{2}$ is correct
3 Both $S_{1}$ and $S_{2}$ are wrong
4 Both $\mathrm{S}_{1}$ and $\mathrm{S}_{2}$ are correct
ELECTROCHEMISTRY

276156 $\Lambda_{\mathrm{m}}^{\mathrm{o}}$ for $\mathrm{NaCl}, \mathrm{HCl}$ and $\mathrm{NaA}$ are 126.4, 425.9 and $100.5 \mathrm{~S} \mathrm{~cm} \mathrm{~mol}^{-1}$, respectively. If the conductivity of $0.001 \mathrm{M} \mathrm{HA}$ is $5 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$, degree of dissociation of $\mathrm{HA}$ is

1 0.25
2 0.50
3 0.75
4 0.125
ELECTROCHEMISTRY

276157 The decreasing order of electrical conductivity of the following aqueous solution is
0.1 M formic acid (A),
$0.1 \mathrm{M}$ acetic acid (B),
0.1 M benzoic acid (C).

1 $\mathrm{A}>\mathrm{C}>\mathrm{B}$
2 $\mathrm{C}>\mathrm{B}>\mathrm{A}$
3 $\mathrm{A}>\mathrm{B}>\mathrm{C}$
4 $\mathrm{C}>\mathrm{A}>\mathrm{B}$
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ELECTROCHEMISTRY

276151 The specific conductivity of $0.1 \mathrm{~N} \mathrm{KCl}$ solution is $0.0129 \mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$. The resistance of the solution in the cell is $100 \mathrm{ohm}$. The cell constant of the cell will be :

1 0.56
2 2.80
3 1.10
4 1.29
ELECTROCHEMISTRY

276152 The resistance of $\frac{1}{10} M$ solution is $2.5 \times 10^{3} \mathrm{ohm}$.
What is the molar conductivity of solution? (cell constant $=1.25 \mathrm{~cm}^{-1}$ )

1 $3.5 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
2 $5.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
3 $2.5 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
4 $2.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276154 Consider the statements $S_{1}$ and $S_{2}$ :
$S_{1}$ : Conductivity always increases with decrease in the concentration of electrolyte.
$S_{2}$ : Molar conductivity always increase with decrease in the concentration of electrolyte. The correct option among the following is

1 $S_{1}$ is correct and $S_{2}$ is wrong
2 $\mathrm{S}_{1}$ is wrong and $\mathrm{S}_{2}$ is correct
3 Both $S_{1}$ and $S_{2}$ are wrong
4 Both $\mathrm{S}_{1}$ and $\mathrm{S}_{2}$ are correct
ELECTROCHEMISTRY

276156 $\Lambda_{\mathrm{m}}^{\mathrm{o}}$ for $\mathrm{NaCl}, \mathrm{HCl}$ and $\mathrm{NaA}$ are 126.4, 425.9 and $100.5 \mathrm{~S} \mathrm{~cm} \mathrm{~mol}^{-1}$, respectively. If the conductivity of $0.001 \mathrm{M} \mathrm{HA}$ is $5 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$, degree of dissociation of $\mathrm{HA}$ is

1 0.25
2 0.50
3 0.75
4 0.125
ELECTROCHEMISTRY

276157 The decreasing order of electrical conductivity of the following aqueous solution is
0.1 M formic acid (A),
$0.1 \mathrm{M}$ acetic acid (B),
0.1 M benzoic acid (C).

1 $\mathrm{A}>\mathrm{C}>\mathrm{B}$
2 $\mathrm{C}>\mathrm{B}>\mathrm{A}$
3 $\mathrm{A}>\mathrm{B}>\mathrm{C}$
4 $\mathrm{C}>\mathrm{A}>\mathrm{B}$
ELECTROCHEMISTRY

276151 The specific conductivity of $0.1 \mathrm{~N} \mathrm{KCl}$ solution is $0.0129 \mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$. The resistance of the solution in the cell is $100 \mathrm{ohm}$. The cell constant of the cell will be :

1 0.56
2 2.80
3 1.10
4 1.29
ELECTROCHEMISTRY

276152 The resistance of $\frac{1}{10} M$ solution is $2.5 \times 10^{3} \mathrm{ohm}$.
What is the molar conductivity of solution? (cell constant $=1.25 \mathrm{~cm}^{-1}$ )

1 $3.5 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
2 $5.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
3 $2.5 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
4 $2.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276154 Consider the statements $S_{1}$ and $S_{2}$ :
$S_{1}$ : Conductivity always increases with decrease in the concentration of electrolyte.
$S_{2}$ : Molar conductivity always increase with decrease in the concentration of electrolyte. The correct option among the following is

1 $S_{1}$ is correct and $S_{2}$ is wrong
2 $\mathrm{S}_{1}$ is wrong and $\mathrm{S}_{2}$ is correct
3 Both $S_{1}$ and $S_{2}$ are wrong
4 Both $\mathrm{S}_{1}$ and $\mathrm{S}_{2}$ are correct
ELECTROCHEMISTRY

276156 $\Lambda_{\mathrm{m}}^{\mathrm{o}}$ for $\mathrm{NaCl}, \mathrm{HCl}$ and $\mathrm{NaA}$ are 126.4, 425.9 and $100.5 \mathrm{~S} \mathrm{~cm} \mathrm{~mol}^{-1}$, respectively. If the conductivity of $0.001 \mathrm{M} \mathrm{HA}$ is $5 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$, degree of dissociation of $\mathrm{HA}$ is

1 0.25
2 0.50
3 0.75
4 0.125
ELECTROCHEMISTRY

276157 The decreasing order of electrical conductivity of the following aqueous solution is
0.1 M formic acid (A),
$0.1 \mathrm{M}$ acetic acid (B),
0.1 M benzoic acid (C).

1 $\mathrm{A}>\mathrm{C}>\mathrm{B}$
2 $\mathrm{C}>\mathrm{B}>\mathrm{A}$
3 $\mathrm{A}>\mathrm{B}>\mathrm{C}$
4 $\mathrm{C}>\mathrm{A}>\mathrm{B}$
ELECTROCHEMISTRY

276151 The specific conductivity of $0.1 \mathrm{~N} \mathrm{KCl}$ solution is $0.0129 \mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$. The resistance of the solution in the cell is $100 \mathrm{ohm}$. The cell constant of the cell will be :

1 0.56
2 2.80
3 1.10
4 1.29
ELECTROCHEMISTRY

276152 The resistance of $\frac{1}{10} M$ solution is $2.5 \times 10^{3} \mathrm{ohm}$.
What is the molar conductivity of solution? (cell constant $=1.25 \mathrm{~cm}^{-1}$ )

1 $3.5 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
2 $5.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
3 $2.5 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
4 $2.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276154 Consider the statements $S_{1}$ and $S_{2}$ :
$S_{1}$ : Conductivity always increases with decrease in the concentration of electrolyte.
$S_{2}$ : Molar conductivity always increase with decrease in the concentration of electrolyte. The correct option among the following is

1 $S_{1}$ is correct and $S_{2}$ is wrong
2 $\mathrm{S}_{1}$ is wrong and $\mathrm{S}_{2}$ is correct
3 Both $S_{1}$ and $S_{2}$ are wrong
4 Both $\mathrm{S}_{1}$ and $\mathrm{S}_{2}$ are correct
ELECTROCHEMISTRY

276156 $\Lambda_{\mathrm{m}}^{\mathrm{o}}$ for $\mathrm{NaCl}, \mathrm{HCl}$ and $\mathrm{NaA}$ are 126.4, 425.9 and $100.5 \mathrm{~S} \mathrm{~cm} \mathrm{~mol}^{-1}$, respectively. If the conductivity of $0.001 \mathrm{M} \mathrm{HA}$ is $5 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$, degree of dissociation of $\mathrm{HA}$ is

1 0.25
2 0.50
3 0.75
4 0.125
ELECTROCHEMISTRY

276157 The decreasing order of electrical conductivity of the following aqueous solution is
0.1 M formic acid (A),
$0.1 \mathrm{M}$ acetic acid (B),
0.1 M benzoic acid (C).

1 $\mathrm{A}>\mathrm{C}>\mathrm{B}$
2 $\mathrm{C}>\mathrm{B}>\mathrm{A}$
3 $\mathrm{A}>\mathrm{B}>\mathrm{C}$
4 $\mathrm{C}>\mathrm{A}>\mathrm{B}$