04. Conductance and Conductor
ELECTROCHEMISTRY

276164 0.1 mole, per litre solution is present in a conductivity cell where electrode of $100 \mathrm{~cm}^{2}$ area are placed at $1 \mathrm{~cm}$ apart and resistance observed is $5 \times 10^{3} \mathrm{Ohm}$, what is molar conductivity of solution?

1 $5 \times 10^{2} \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
2 $2 \times 10^{4} \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
3 $200 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
4 $0.02 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276165 Specific conductance of 0.1 MHA is $3.75 \times 10^{-4} \mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$. If
$\Lambda^{\infty}(\mathrm{HA})=250 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$, the dissociation constant $K_{\mathrm{a}}$ of $\mathrm{HA}$ is:

1 $1.0 \times 10^{-5}$
2 $2.25 \times 10^{-4}$
3 $2.25 \times 10^{-5}$
4 $2.25 \times 10^{-13}$
ELECTROCHEMISTRY

276169 Which one of the following is corrected plot of $\Lambda_{\mathrm{m}}\left(\right.$ in $\left.\mathrm{S} \mathrm{cm}^{2} \mathrm{~mol}^{-1}\right)$ and $\sqrt{\mathrm{C}}$ [in $\left.(\mathrm{mol} / \mathrm{L})^{1 / 2}\right]$ for KCl solution? $\left(Y=\Lambda_{m} ; x=\sqrt{C}\right)$

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2
3
4
ELECTROCHEMISTRY

276170 The molar conductivity of a $0.5 \mathrm{~mol} / \mathrm{cm}^{3}$ solution of $\mathrm{AgNO}_{3}$ with electrolytic conductivity of $5.76 \times 10^{-3} \mathrm{~S} \mathrm{~cm}^{-1}$ at $298 \mathrm{~K}$ is

1 $2.88 \mathrm{~S} \mathrm{~cm} / \mathrm{mol}$
2 $11.52 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
3 $0.086 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
4 $28.8 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
ELECTROCHEMISTRY

276164 0.1 mole, per litre solution is present in a conductivity cell where electrode of $100 \mathrm{~cm}^{2}$ area are placed at $1 \mathrm{~cm}$ apart and resistance observed is $5 \times 10^{3} \mathrm{Ohm}$, what is molar conductivity of solution?

1 $5 \times 10^{2} \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
2 $2 \times 10^{4} \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
3 $200 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
4 $0.02 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276165 Specific conductance of 0.1 MHA is $3.75 \times 10^{-4} \mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$. If
$\Lambda^{\infty}(\mathrm{HA})=250 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$, the dissociation constant $K_{\mathrm{a}}$ of $\mathrm{HA}$ is:

1 $1.0 \times 10^{-5}$
2 $2.25 \times 10^{-4}$
3 $2.25 \times 10^{-5}$
4 $2.25 \times 10^{-13}$
ELECTROCHEMISTRY

276169 Which one of the following is corrected plot of $\Lambda_{\mathrm{m}}\left(\right.$ in $\left.\mathrm{S} \mathrm{cm}^{2} \mathrm{~mol}^{-1}\right)$ and $\sqrt{\mathrm{C}}$ [in $\left.(\mathrm{mol} / \mathrm{L})^{1 / 2}\right]$ for KCl solution? $\left(Y=\Lambda_{m} ; x=\sqrt{C}\right)$

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2
3
4
ELECTROCHEMISTRY

276170 The molar conductivity of a $0.5 \mathrm{~mol} / \mathrm{cm}^{3}$ solution of $\mathrm{AgNO}_{3}$ with electrolytic conductivity of $5.76 \times 10^{-3} \mathrm{~S} \mathrm{~cm}^{-1}$ at $298 \mathrm{~K}$ is

1 $2.88 \mathrm{~S} \mathrm{~cm} / \mathrm{mol}$
2 $11.52 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
3 $0.086 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
4 $28.8 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
ELECTROCHEMISTRY

276164 0.1 mole, per litre solution is present in a conductivity cell where electrode of $100 \mathrm{~cm}^{2}$ area are placed at $1 \mathrm{~cm}$ apart and resistance observed is $5 \times 10^{3} \mathrm{Ohm}$, what is molar conductivity of solution?

1 $5 \times 10^{2} \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
2 $2 \times 10^{4} \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
3 $200 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
4 $0.02 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276165 Specific conductance of 0.1 MHA is $3.75 \times 10^{-4} \mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$. If
$\Lambda^{\infty}(\mathrm{HA})=250 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$, the dissociation constant $K_{\mathrm{a}}$ of $\mathrm{HA}$ is:

1 $1.0 \times 10^{-5}$
2 $2.25 \times 10^{-4}$
3 $2.25 \times 10^{-5}$
4 $2.25 \times 10^{-13}$
ELECTROCHEMISTRY

276169 Which one of the following is corrected plot of $\Lambda_{\mathrm{m}}\left(\right.$ in $\left.\mathrm{S} \mathrm{cm}^{2} \mathrm{~mol}^{-1}\right)$ and $\sqrt{\mathrm{C}}$ [in $\left.(\mathrm{mol} / \mathrm{L})^{1 / 2}\right]$ for KCl solution? $\left(Y=\Lambda_{m} ; x=\sqrt{C}\right)$

1
2
3
4
ELECTROCHEMISTRY

276170 The molar conductivity of a $0.5 \mathrm{~mol} / \mathrm{cm}^{3}$ solution of $\mathrm{AgNO}_{3}$ with electrolytic conductivity of $5.76 \times 10^{-3} \mathrm{~S} \mathrm{~cm}^{-1}$ at $298 \mathrm{~K}$ is

1 $2.88 \mathrm{~S} \mathrm{~cm} / \mathrm{mol}$
2 $11.52 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
3 $0.086 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
4 $28.8 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
ELECTROCHEMISTRY

276164 0.1 mole, per litre solution is present in a conductivity cell where electrode of $100 \mathrm{~cm}^{2}$ area are placed at $1 \mathrm{~cm}$ apart and resistance observed is $5 \times 10^{3} \mathrm{Ohm}$, what is molar conductivity of solution?

1 $5 \times 10^{2} \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
2 $2 \times 10^{4} \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
3 $200 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
4 $0.02 \mathrm{~S} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$
ELECTROCHEMISTRY

276165 Specific conductance of 0.1 MHA is $3.75 \times 10^{-4} \mathrm{ohm}^{-1} \mathrm{~cm}^{-1}$. If
$\Lambda^{\infty}(\mathrm{HA})=250 \mathrm{ohm}^{-1} \mathrm{~cm}^{2} \mathrm{~mol}^{-1}$, the dissociation constant $K_{\mathrm{a}}$ of $\mathrm{HA}$ is:

1 $1.0 \times 10^{-5}$
2 $2.25 \times 10^{-4}$
3 $2.25 \times 10^{-5}$
4 $2.25 \times 10^{-13}$
ELECTROCHEMISTRY

276169 Which one of the following is corrected plot of $\Lambda_{\mathrm{m}}\left(\right.$ in $\left.\mathrm{S} \mathrm{cm}^{2} \mathrm{~mol}^{-1}\right)$ and $\sqrt{\mathrm{C}}$ [in $\left.(\mathrm{mol} / \mathrm{L})^{1 / 2}\right]$ for KCl solution? $\left(Y=\Lambda_{m} ; x=\sqrt{C}\right)$

1
2
3
4
ELECTROCHEMISTRY

276170 The molar conductivity of a $0.5 \mathrm{~mol} / \mathrm{cm}^{3}$ solution of $\mathrm{AgNO}_{3}$ with electrolytic conductivity of $5.76 \times 10^{-3} \mathrm{~S} \mathrm{~cm}^{-1}$ at $298 \mathrm{~K}$ is

1 $2.88 \mathrm{~S} \mathrm{~cm} / \mathrm{mol}$
2 $11.52 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
3 $0.086 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$
4 $28.8 \mathrm{~S} \mathrm{~cm}^{2} / \mathrm{mol}$