Fuel Cells
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CHXII03:ELECTROCHEMISTRY

330306 The combustion of butane in \({{\rm{O}}_{\rm{2}}}\) at 1 bar and 298 K shows a decrease in free energy equal to \({\rm{2}}{\rm{.75 \times 1}}{{\rm{0}}^{\rm{3}}}{\rm{kJ}}\,\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) in a fuel cell. \({{\rm{K}}_{\rm{c}}}\,\,{\rm{and}}\,\,{{\rm{E}}^{\rm{o}}}\) of the fuel cell are, respectively

1 \({\rm{9}}{\rm{.55 \times 1}}{{\rm{0}}^{{\rm{482}}}}{\rm{,1}}{\rm{.096V}}\)
2 \({\rm{9}}{\rm{.55,1}}{\rm{.096V}}\)
3 \({\rm{1}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{966}}}}{\rm{,2}}{\rm{.85V}}\)
4 \({\rm{5}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{484}}}}{\rm{,0}}{\rm{.55V}}\)
CHXII03:ELECTROCHEMISTRY

330307 The formation of rust on the surface of iron occurs through the reaction(s)

1 \({{\rm{O}}_{\rm{2}}}{\rm{(g) + 4}}{{\rm{H}}^{\rm{ + }}}{\rm{(aq) + 4}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{H}}_{\rm{2}}}{\rm{O(l)}}\)
\({\rm{(at}}{\mkern 1mu} {\mkern 1mu} {\rm{cathode)}}\)
2 \({\rm{Fe(s)}} \to {\rm{F}}{{\rm{e}}^{{\rm{2 + }}}}{\rm{(aq) + 2}}{{\rm{e}}^{\rm{ - }}}{\rm{(at}}{\mkern 1mu} {\mkern 1mu} {\rm{anode)}}\)
3 \({\rm{F}}{{\rm{e}}^{{\rm{2 + }}}}{\rm{(aq) + }}{{\rm{O}}_{\rm{2}}}{\rm{(g) + 4}}{{\rm{H}}_{\rm{2}}}{\rm{O(l)}} \to {\rm{2F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(s) + 8}}{{\rm{H}}^{\rm{ + }}}\)
4 All of the above
CHXII03:ELECTROCHEMISTRY

330308 Assertion :
In thermal plants, the chemical energy (heat of combustion) of fossil fuels (coal, gas or oil) is used to produce electricity.
Reason :
Production of electricity by thermal plants is a very efficient method.

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 Assertion is incorrect but Reason is correct.
CHXII03:ELECTROCHEMISTRY

330309 Assertion :
\(\mathrm{H}_{2}-\mathrm{O}_{2}\) fuel cell is generally used in Apollo space programme.
Reason :
The fuel cell uses the reaction of hydrogen with oxygen to provide electrical power and water.

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 Assertion is incorrect but Reason is correct.
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CHXII03:ELECTROCHEMISTRY

330306 The combustion of butane in \({{\rm{O}}_{\rm{2}}}\) at 1 bar and 298 K shows a decrease in free energy equal to \({\rm{2}}{\rm{.75 \times 1}}{{\rm{0}}^{\rm{3}}}{\rm{kJ}}\,\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) in a fuel cell. \({{\rm{K}}_{\rm{c}}}\,\,{\rm{and}}\,\,{{\rm{E}}^{\rm{o}}}\) of the fuel cell are, respectively

1 \({\rm{9}}{\rm{.55 \times 1}}{{\rm{0}}^{{\rm{482}}}}{\rm{,1}}{\rm{.096V}}\)
2 \({\rm{9}}{\rm{.55,1}}{\rm{.096V}}\)
3 \({\rm{1}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{966}}}}{\rm{,2}}{\rm{.85V}}\)
4 \({\rm{5}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{484}}}}{\rm{,0}}{\rm{.55V}}\)
CHXII03:ELECTROCHEMISTRY

330307 The formation of rust on the surface of iron occurs through the reaction(s)

1 \({{\rm{O}}_{\rm{2}}}{\rm{(g) + 4}}{{\rm{H}}^{\rm{ + }}}{\rm{(aq) + 4}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{H}}_{\rm{2}}}{\rm{O(l)}}\)
\({\rm{(at}}{\mkern 1mu} {\mkern 1mu} {\rm{cathode)}}\)
2 \({\rm{Fe(s)}} \to {\rm{F}}{{\rm{e}}^{{\rm{2 + }}}}{\rm{(aq) + 2}}{{\rm{e}}^{\rm{ - }}}{\rm{(at}}{\mkern 1mu} {\mkern 1mu} {\rm{anode)}}\)
3 \({\rm{F}}{{\rm{e}}^{{\rm{2 + }}}}{\rm{(aq) + }}{{\rm{O}}_{\rm{2}}}{\rm{(g) + 4}}{{\rm{H}}_{\rm{2}}}{\rm{O(l)}} \to {\rm{2F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(s) + 8}}{{\rm{H}}^{\rm{ + }}}\)
4 All of the above
CHXII03:ELECTROCHEMISTRY

330308 Assertion :
In thermal plants, the chemical energy (heat of combustion) of fossil fuels (coal, gas or oil) is used to produce electricity.
Reason :
Production of electricity by thermal plants is a very efficient method.

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 Assertion is incorrect but Reason is correct.
CHXII03:ELECTROCHEMISTRY

330309 Assertion :
\(\mathrm{H}_{2}-\mathrm{O}_{2}\) fuel cell is generally used in Apollo space programme.
Reason :
The fuel cell uses the reaction of hydrogen with oxygen to provide electrical power and water.

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 Assertion is incorrect but Reason is correct.
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CHXII03:ELECTROCHEMISTRY

330306 The combustion of butane in \({{\rm{O}}_{\rm{2}}}\) at 1 bar and 298 K shows a decrease in free energy equal to \({\rm{2}}{\rm{.75 \times 1}}{{\rm{0}}^{\rm{3}}}{\rm{kJ}}\,\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) in a fuel cell. \({{\rm{K}}_{\rm{c}}}\,\,{\rm{and}}\,\,{{\rm{E}}^{\rm{o}}}\) of the fuel cell are, respectively

1 \({\rm{9}}{\rm{.55 \times 1}}{{\rm{0}}^{{\rm{482}}}}{\rm{,1}}{\rm{.096V}}\)
2 \({\rm{9}}{\rm{.55,1}}{\rm{.096V}}\)
3 \({\rm{1}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{966}}}}{\rm{,2}}{\rm{.85V}}\)
4 \({\rm{5}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{484}}}}{\rm{,0}}{\rm{.55V}}\)
CHXII03:ELECTROCHEMISTRY

330307 The formation of rust on the surface of iron occurs through the reaction(s)

1 \({{\rm{O}}_{\rm{2}}}{\rm{(g) + 4}}{{\rm{H}}^{\rm{ + }}}{\rm{(aq) + 4}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{H}}_{\rm{2}}}{\rm{O(l)}}\)
\({\rm{(at}}{\mkern 1mu} {\mkern 1mu} {\rm{cathode)}}\)
2 \({\rm{Fe(s)}} \to {\rm{F}}{{\rm{e}}^{{\rm{2 + }}}}{\rm{(aq) + 2}}{{\rm{e}}^{\rm{ - }}}{\rm{(at}}{\mkern 1mu} {\mkern 1mu} {\rm{anode)}}\)
3 \({\rm{F}}{{\rm{e}}^{{\rm{2 + }}}}{\rm{(aq) + }}{{\rm{O}}_{\rm{2}}}{\rm{(g) + 4}}{{\rm{H}}_{\rm{2}}}{\rm{O(l)}} \to {\rm{2F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(s) + 8}}{{\rm{H}}^{\rm{ + }}}\)
4 All of the above
CHXII03:ELECTROCHEMISTRY

330308 Assertion :
In thermal plants, the chemical energy (heat of combustion) of fossil fuels (coal, gas or oil) is used to produce electricity.
Reason :
Production of electricity by thermal plants is a very efficient method.

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 Assertion is incorrect but Reason is correct.
CHXII03:ELECTROCHEMISTRY

330309 Assertion :
\(\mathrm{H}_{2}-\mathrm{O}_{2}\) fuel cell is generally used in Apollo space programme.
Reason :
The fuel cell uses the reaction of hydrogen with oxygen to provide electrical power and water.

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 Assertion is incorrect but Reason is correct.
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CHXII03:ELECTROCHEMISTRY

330306 The combustion of butane in \({{\rm{O}}_{\rm{2}}}\) at 1 bar and 298 K shows a decrease in free energy equal to \({\rm{2}}{\rm{.75 \times 1}}{{\rm{0}}^{\rm{3}}}{\rm{kJ}}\,\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\) in a fuel cell. \({{\rm{K}}_{\rm{c}}}\,\,{\rm{and}}\,\,{{\rm{E}}^{\rm{o}}}\) of the fuel cell are, respectively

1 \({\rm{9}}{\rm{.55 \times 1}}{{\rm{0}}^{{\rm{482}}}}{\rm{,1}}{\rm{.096V}}\)
2 \({\rm{9}}{\rm{.55,1}}{\rm{.096V}}\)
3 \({\rm{1}}{\rm{.023 \times 1}}{{\rm{0}}^{{\rm{966}}}}{\rm{,2}}{\rm{.85V}}\)
4 \({\rm{5}}{\rm{.5 \times 1}}{{\rm{0}}^{{\rm{484}}}}{\rm{,0}}{\rm{.55V}}\)
CHXII03:ELECTROCHEMISTRY

330307 The formation of rust on the surface of iron occurs through the reaction(s)

1 \({{\rm{O}}_{\rm{2}}}{\rm{(g) + 4}}{{\rm{H}}^{\rm{ + }}}{\rm{(aq) + 4}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{H}}_{\rm{2}}}{\rm{O(l)}}\)
\({\rm{(at}}{\mkern 1mu} {\mkern 1mu} {\rm{cathode)}}\)
2 \({\rm{Fe(s)}} \to {\rm{F}}{{\rm{e}}^{{\rm{2 + }}}}{\rm{(aq) + 2}}{{\rm{e}}^{\rm{ - }}}{\rm{(at}}{\mkern 1mu} {\mkern 1mu} {\rm{anode)}}\)
3 \({\rm{F}}{{\rm{e}}^{{\rm{2 + }}}}{\rm{(aq) + }}{{\rm{O}}_{\rm{2}}}{\rm{(g) + 4}}{{\rm{H}}_{\rm{2}}}{\rm{O(l)}} \to {\rm{2F}}{{\rm{e}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{(s) + 8}}{{\rm{H}}^{\rm{ + }}}\)
4 All of the above
CHXII03:ELECTROCHEMISTRY

330308 Assertion :
In thermal plants, the chemical energy (heat of combustion) of fossil fuels (coal, gas or oil) is used to produce electricity.
Reason :
Production of electricity by thermal plants is a very efficient method.

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 Assertion is incorrect but Reason is correct.
CHXII03:ELECTROCHEMISTRY

330309 Assertion :
\(\mathrm{H}_{2}-\mathrm{O}_{2}\) fuel cell is generally used in Apollo space programme.
Reason :
The fuel cell uses the reaction of hydrogen with oxygen to provide electrical power and water.

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 Assertion is incorrect but Reason is correct.
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