Effect of Concentration on emf of cell - Nernst Equation
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CHXII03:ELECTROCHEMISTRY

329982 The relationship between standard reduction potential of cell (in volts) and equilibrium constant at \({\mathrm{25{ }^{\circ} \mathrm{C}}}\) is shown by \({\mathrm{\mathrm{E}_{\mathrm{cell}}^{\circ}=\dfrac{5.91 \times 10^{-\mathrm{x}}}{\mathrm{n}} \log _{10} \mathrm{~K}}}\). The value of ' X ' is ____ .

1 10
2 2
3 1
4 4
CHXII03:ELECTROCHEMISTRY

329983 Assertion :
\(\mathrm{E}_{\text {cell }}\) increases with increase in concentration of \(\mathrm{Ag}^{+}\)ions for the following reaction, \(\mathrm{Ag}^{+}+\mathrm{e}^{-} \rightarrow \mathrm{Ag}\)
Reason :
\(\mathrm{E}_{\text {cell }}\) has positive value.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
AIIMS - 2017
CHXII03:ELECTROCHEMISTRY

329984 If standard \({\mathrm{\mathrm{Zn}^{2+} / \mathrm{Zn}}}\) electrode is diluted to 10 times, then cell e.m.f. is increased by ____ V .

1 10
2 0.06
3 0.03
4 0.5
CHXII03:ELECTROCHEMISTRY

329985 The reduction potential of hydrogen half-cell will be negative if

1 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 2}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 2}}{\rm{.0 M}}\)
2 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 2}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 1}}{\rm{.0 M}}\)
3 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 1}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 1}}{\rm{.0 M}}\)
4 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 1}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 2}}{\rm{.0 M}}\)
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CHXII03:ELECTROCHEMISTRY

329982 The relationship between standard reduction potential of cell (in volts) and equilibrium constant at \({\mathrm{25{ }^{\circ} \mathrm{C}}}\) is shown by \({\mathrm{\mathrm{E}_{\mathrm{cell}}^{\circ}=\dfrac{5.91 \times 10^{-\mathrm{x}}}{\mathrm{n}} \log _{10} \mathrm{~K}}}\). The value of ' X ' is ____ .

1 10
2 2
3 1
4 4
CHXII03:ELECTROCHEMISTRY

329983 Assertion :
\(\mathrm{E}_{\text {cell }}\) increases with increase in concentration of \(\mathrm{Ag}^{+}\)ions for the following reaction, \(\mathrm{Ag}^{+}+\mathrm{e}^{-} \rightarrow \mathrm{Ag}\)
Reason :
\(\mathrm{E}_{\text {cell }}\) has positive value.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
AIIMS - 2017
CHXII03:ELECTROCHEMISTRY

329984 If standard \({\mathrm{\mathrm{Zn}^{2+} / \mathrm{Zn}}}\) electrode is diluted to 10 times, then cell e.m.f. is increased by ____ V .

1 10
2 0.06
3 0.03
4 0.5
CHXII03:ELECTROCHEMISTRY

329985 The reduction potential of hydrogen half-cell will be negative if

1 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 2}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 2}}{\rm{.0 M}}\)
2 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 2}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 1}}{\rm{.0 M}}\)
3 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 1}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 1}}{\rm{.0 M}}\)
4 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 1}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 2}}{\rm{.0 M}}\)
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CHXII03:ELECTROCHEMISTRY

329982 The relationship between standard reduction potential of cell (in volts) and equilibrium constant at \({\mathrm{25{ }^{\circ} \mathrm{C}}}\) is shown by \({\mathrm{\mathrm{E}_{\mathrm{cell}}^{\circ}=\dfrac{5.91 \times 10^{-\mathrm{x}}}{\mathrm{n}} \log _{10} \mathrm{~K}}}\). The value of ' X ' is ____ .

1 10
2 2
3 1
4 4
CHXII03:ELECTROCHEMISTRY

329983 Assertion :
\(\mathrm{E}_{\text {cell }}\) increases with increase in concentration of \(\mathrm{Ag}^{+}\)ions for the following reaction, \(\mathrm{Ag}^{+}+\mathrm{e}^{-} \rightarrow \mathrm{Ag}\)
Reason :
\(\mathrm{E}_{\text {cell }}\) has positive value.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
AIIMS - 2017
CHXII03:ELECTROCHEMISTRY

329984 If standard \({\mathrm{\mathrm{Zn}^{2+} / \mathrm{Zn}}}\) electrode is diluted to 10 times, then cell e.m.f. is increased by ____ V .

1 10
2 0.06
3 0.03
4 0.5
CHXII03:ELECTROCHEMISTRY

329985 The reduction potential of hydrogen half-cell will be negative if

1 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 2}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 2}}{\rm{.0 M}}\)
2 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 2}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 1}}{\rm{.0 M}}\)
3 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 1}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 1}}{\rm{.0 M}}\)
4 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 1}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 2}}{\rm{.0 M}}\)
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CHXII03:ELECTROCHEMISTRY

329982 The relationship between standard reduction potential of cell (in volts) and equilibrium constant at \({\mathrm{25{ }^{\circ} \mathrm{C}}}\) is shown by \({\mathrm{\mathrm{E}_{\mathrm{cell}}^{\circ}=\dfrac{5.91 \times 10^{-\mathrm{x}}}{\mathrm{n}} \log _{10} \mathrm{~K}}}\). The value of ' X ' is ____ .

1 10
2 2
3 1
4 4
CHXII03:ELECTROCHEMISTRY

329983 Assertion :
\(\mathrm{E}_{\text {cell }}\) increases with increase in concentration of \(\mathrm{Ag}^{+}\)ions for the following reaction, \(\mathrm{Ag}^{+}+\mathrm{e}^{-} \rightarrow \mathrm{Ag}\)
Reason :
\(\mathrm{E}_{\text {cell }}\) has positive value.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
AIIMS - 2017
CHXII03:ELECTROCHEMISTRY

329984 If standard \({\mathrm{\mathrm{Zn}^{2+} / \mathrm{Zn}}}\) electrode is diluted to 10 times, then cell e.m.f. is increased by ____ V .

1 10
2 0.06
3 0.03
4 0.5
CHXII03:ELECTROCHEMISTRY

329985 The reduction potential of hydrogen half-cell will be negative if

1 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 2}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 2}}{\rm{.0 M}}\)
2 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 2}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 1}}{\rm{.0 M}}\)
3 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 1}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 1}}{\rm{.0 M}}\)
4 \({\rm{p}}\left( {{{\rm{H}}_{\rm{2}}}} \right){\rm{ = 1}}\,\,{\rm{atm}}\,\,{\rm{and}}\,\,\left[ {{{\rm{H}}^{\rm{ + }}}} \right]{\rm{ = 2}}{\rm{.0 M}}\)
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