03. ELECTROCHEMISTRY[KARNATAKA CET EXCLUSIVE]
CHEMISTRY(KCET)

285388 For spontaneity of a cell, which is correct?

1 \(\Delta G=+\mathrm{ve}, \Delta E=+\mathrm{ve}\)
2 \(\Delta G=-v e\)
3 \(\Delta G=0, \Delta E=0\)
4 \(\Delta G=-\mathrm{ve}, \Delta E=0\)
CHEMISTRY(KCET)

285389 Consider the following electrodes:

\(P=\mathrm{Zn}^{2+}(0.0001 \mathrm{M}) / \mathrm{Zn}\);
\(Q=\mathrm{Zn}^{2+}(0.1 \mathrm{M}) / \mathrm{Zn}\);
\(R=\mathrm{Zn}^{2+}(0.01 \mathrm{M}) / \mathrm{Zn}\);
\(S=\mathrm{Zn}^{2+}(0.001 \mathrm{M}) / \mathrm{Zn}\)
\(\mathrm{E}_{\mathrm{Zn} / \mathrm{Zn}^{2+}}^{\circ}=-0.76 \mathrm{~V}\) electrode potentials of the above electrode in volts are in the order

1 \(P>S>R>Q\)
2 \(S>R>Q>P\)
3 \(Q>R>S>P\)
4 \(P>Q>R>S\)
CHEMISTRY(KCET)

285390 The resistance of 0.01 M KCl solution at 298 K is\(1500 \Omega\). If the conductivity of 0.01 M KCl solution at 298 K is \(0.1466 \times 10^{-3} \mathrm{~S} \mathrm{~cm}^{-1}\). The cell constant of the conductivity cell in \(\left(\mathrm{cm}^{-1}\right)\) is

1 0.219
2 0.291
3 0.301
4 0.194
CHEMISTRY(KCET)

285391 \(\mathrm{H}_2(\mathrm{~g})+2 \mathrm{AgCl}(\mathrm{s}) \rightleftharpoons 2 \mathrm{Ag}(\mathrm{s})+2 \mathrm{HCl}(\mathrm{aq})\) \(E_{\text {cell }}^{\circ}\) at \(25^{\circ} \mathrm{C}\) for the cell is 0.22 V . The equilibrium constant at \(25^{\circ} \mathrm{C}\) is

1 \(2.8 \times 10^7\)
2 \(5.2 \times 10^8\)
3 \(2.8 \times 10^5\)
4 \(5.2 \times 10^4\)
CHEMISTRY(KCET)

285388 For spontaneity of a cell, which is correct?

1 \(\Delta G=+\mathrm{ve}, \Delta E=+\mathrm{ve}\)
2 \(\Delta G=-v e\)
3 \(\Delta G=0, \Delta E=0\)
4 \(\Delta G=-\mathrm{ve}, \Delta E=0\)
CHEMISTRY(KCET)

285389 Consider the following electrodes:

\(P=\mathrm{Zn}^{2+}(0.0001 \mathrm{M}) / \mathrm{Zn}\);
\(Q=\mathrm{Zn}^{2+}(0.1 \mathrm{M}) / \mathrm{Zn}\);
\(R=\mathrm{Zn}^{2+}(0.01 \mathrm{M}) / \mathrm{Zn}\);
\(S=\mathrm{Zn}^{2+}(0.001 \mathrm{M}) / \mathrm{Zn}\)
\(\mathrm{E}_{\mathrm{Zn} / \mathrm{Zn}^{2+}}^{\circ}=-0.76 \mathrm{~V}\) electrode potentials of the above electrode in volts are in the order

1 \(P>S>R>Q\)
2 \(S>R>Q>P\)
3 \(Q>R>S>P\)
4 \(P>Q>R>S\)
CHEMISTRY(KCET)

285390 The resistance of 0.01 M KCl solution at 298 K is\(1500 \Omega\). If the conductivity of 0.01 M KCl solution at 298 K is \(0.1466 \times 10^{-3} \mathrm{~S} \mathrm{~cm}^{-1}\). The cell constant of the conductivity cell in \(\left(\mathrm{cm}^{-1}\right)\) is

1 0.219
2 0.291
3 0.301
4 0.194
CHEMISTRY(KCET)

285391 \(\mathrm{H}_2(\mathrm{~g})+2 \mathrm{AgCl}(\mathrm{s}) \rightleftharpoons 2 \mathrm{Ag}(\mathrm{s})+2 \mathrm{HCl}(\mathrm{aq})\) \(E_{\text {cell }}^{\circ}\) at \(25^{\circ} \mathrm{C}\) for the cell is 0.22 V . The equilibrium constant at \(25^{\circ} \mathrm{C}\) is

1 \(2.8 \times 10^7\)
2 \(5.2 \times 10^8\)
3 \(2.8 \times 10^5\)
4 \(5.2 \times 10^4\)
CHEMISTRY(KCET)

285388 For spontaneity of a cell, which is correct?

1 \(\Delta G=+\mathrm{ve}, \Delta E=+\mathrm{ve}\)
2 \(\Delta G=-v e\)
3 \(\Delta G=0, \Delta E=0\)
4 \(\Delta G=-\mathrm{ve}, \Delta E=0\)
CHEMISTRY(KCET)

285389 Consider the following electrodes:

\(P=\mathrm{Zn}^{2+}(0.0001 \mathrm{M}) / \mathrm{Zn}\);
\(Q=\mathrm{Zn}^{2+}(0.1 \mathrm{M}) / \mathrm{Zn}\);
\(R=\mathrm{Zn}^{2+}(0.01 \mathrm{M}) / \mathrm{Zn}\);
\(S=\mathrm{Zn}^{2+}(0.001 \mathrm{M}) / \mathrm{Zn}\)
\(\mathrm{E}_{\mathrm{Zn} / \mathrm{Zn}^{2+}}^{\circ}=-0.76 \mathrm{~V}\) electrode potentials of the above electrode in volts are in the order

1 \(P>S>R>Q\)
2 \(S>R>Q>P\)
3 \(Q>R>S>P\)
4 \(P>Q>R>S\)
CHEMISTRY(KCET)

285390 The resistance of 0.01 M KCl solution at 298 K is\(1500 \Omega\). If the conductivity of 0.01 M KCl solution at 298 K is \(0.1466 \times 10^{-3} \mathrm{~S} \mathrm{~cm}^{-1}\). The cell constant of the conductivity cell in \(\left(\mathrm{cm}^{-1}\right)\) is

1 0.219
2 0.291
3 0.301
4 0.194
CHEMISTRY(KCET)

285391 \(\mathrm{H}_2(\mathrm{~g})+2 \mathrm{AgCl}(\mathrm{s}) \rightleftharpoons 2 \mathrm{Ag}(\mathrm{s})+2 \mathrm{HCl}(\mathrm{aq})\) \(E_{\text {cell }}^{\circ}\) at \(25^{\circ} \mathrm{C}\) for the cell is 0.22 V . The equilibrium constant at \(25^{\circ} \mathrm{C}\) is

1 \(2.8 \times 10^7\)
2 \(5.2 \times 10^8\)
3 \(2.8 \times 10^5\)
4 \(5.2 \times 10^4\)
CHEMISTRY(KCET)

285388 For spontaneity of a cell, which is correct?

1 \(\Delta G=+\mathrm{ve}, \Delta E=+\mathrm{ve}\)
2 \(\Delta G=-v e\)
3 \(\Delta G=0, \Delta E=0\)
4 \(\Delta G=-\mathrm{ve}, \Delta E=0\)
CHEMISTRY(KCET)

285389 Consider the following electrodes:

\(P=\mathrm{Zn}^{2+}(0.0001 \mathrm{M}) / \mathrm{Zn}\);
\(Q=\mathrm{Zn}^{2+}(0.1 \mathrm{M}) / \mathrm{Zn}\);
\(R=\mathrm{Zn}^{2+}(0.01 \mathrm{M}) / \mathrm{Zn}\);
\(S=\mathrm{Zn}^{2+}(0.001 \mathrm{M}) / \mathrm{Zn}\)
\(\mathrm{E}_{\mathrm{Zn} / \mathrm{Zn}^{2+}}^{\circ}=-0.76 \mathrm{~V}\) electrode potentials of the above electrode in volts are in the order

1 \(P>S>R>Q\)
2 \(S>R>Q>P\)
3 \(Q>R>S>P\)
4 \(P>Q>R>S\)
CHEMISTRY(KCET)

285390 The resistance of 0.01 M KCl solution at 298 K is\(1500 \Omega\). If the conductivity of 0.01 M KCl solution at 298 K is \(0.1466 \times 10^{-3} \mathrm{~S} \mathrm{~cm}^{-1}\). The cell constant of the conductivity cell in \(\left(\mathrm{cm}^{-1}\right)\) is

1 0.219
2 0.291
3 0.301
4 0.194
CHEMISTRY(KCET)

285391 \(\mathrm{H}_2(\mathrm{~g})+2 \mathrm{AgCl}(\mathrm{s}) \rightleftharpoons 2 \mathrm{Ag}(\mathrm{s})+2 \mathrm{HCl}(\mathrm{aq})\) \(E_{\text {cell }}^{\circ}\) at \(25^{\circ} \mathrm{C}\) for the cell is 0.22 V . The equilibrium constant at \(25^{\circ} \mathrm{C}\) is

1 \(2.8 \times 10^7\)
2 \(5.2 \times 10^8\)
3 \(2.8 \times 10^5\)
4 \(5.2 \times 10^4\)