The reactions occurring in \({{\rm{H}}_{\rm{2}}}{\rm{ - }}{{\rm{O}}_{\rm{2}}}\) fuel cell are At anode : \({\rm{2}}{{\rm{H}}_{{\rm{2(g)}}}}{\rm{ + 4OH}}_{{\rm{(aq}}{\rm{.)}}}^{\rm{ - }} \to {\rm{4}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{{\rm{(1)}}}}{\rm{ + 4}}{{\rm{e}}^{\rm{ - }}}\) \(\frac{{{\rm{At}}\,\,{\rm{cathode}}:\,\,\,{{\rm{O}}_{{\rm{2}}({\rm{g}})}}{\rm{ + 2}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{({\rm{1}})}}{\rm{ + 4}}{{\rm{e}}^{\rm{ - }}} \to {\rm{4OH}}_{({\rm{aq}})}^{\rm{ - }}}}{{{\rm{Overall}}\,\,{\rm{reaction}}:\,\,\,{\rm{2}}{{\rm{H}}_{{\rm{2}}({\rm{g}})}}{\rm{ + }}{{\rm{O}}_{{\rm{2}}({\rm{g}})}} \to {\rm{2}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{({\rm{1}})}}}}\)
KCET - 2015
CHXII03:ELECTROCHEMISTRY
330304
Which of the following acts as oxidising agent in hydrogen-oxygen fuel cell?
1 \({{\rm{H}}_{\rm{2}}}\)
2 \({{\rm{O}}_{\rm{2}}}\)
3 \({\rm{KOH}}\)
4 \({\rm{C}}\)
Explanation:
Hydrogen-oxygen fuel cell is an electrochemical cell that converts the chemical energy of hydrogen which is a fuel and oxygen which act as an oxidising agent into electricity through a pair of redox reaction.
CHXII03:ELECTROCHEMISTRY
330305
Theoretical efficiency of fuel cell is
1 Nearly \(60 \%\)
2 \(50 \%\)
3 \(33 \%\)
4 Nearly \(100 \%\)
Explanation:
Theoretical efficiency of fuel cell is \(100 \%\) but practically it is nearly \(60-70 \%\).
The reactions occurring in \({{\rm{H}}_{\rm{2}}}{\rm{ - }}{{\rm{O}}_{\rm{2}}}\) fuel cell are At anode : \({\rm{2}}{{\rm{H}}_{{\rm{2(g)}}}}{\rm{ + 4OH}}_{{\rm{(aq}}{\rm{.)}}}^{\rm{ - }} \to {\rm{4}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{{\rm{(1)}}}}{\rm{ + 4}}{{\rm{e}}^{\rm{ - }}}\) \(\frac{{{\rm{At}}\,\,{\rm{cathode}}:\,\,\,{{\rm{O}}_{{\rm{2}}({\rm{g}})}}{\rm{ + 2}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{({\rm{1}})}}{\rm{ + 4}}{{\rm{e}}^{\rm{ - }}} \to {\rm{4OH}}_{({\rm{aq}})}^{\rm{ - }}}}{{{\rm{Overall}}\,\,{\rm{reaction}}:\,\,\,{\rm{2}}{{\rm{H}}_{{\rm{2}}({\rm{g}})}}{\rm{ + }}{{\rm{O}}_{{\rm{2}}({\rm{g}})}} \to {\rm{2}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{({\rm{1}})}}}}\)
KCET - 2015
CHXII03:ELECTROCHEMISTRY
330304
Which of the following acts as oxidising agent in hydrogen-oxygen fuel cell?
1 \({{\rm{H}}_{\rm{2}}}\)
2 \({{\rm{O}}_{\rm{2}}}\)
3 \({\rm{KOH}}\)
4 \({\rm{C}}\)
Explanation:
Hydrogen-oxygen fuel cell is an electrochemical cell that converts the chemical energy of hydrogen which is a fuel and oxygen which act as an oxidising agent into electricity through a pair of redox reaction.
CHXII03:ELECTROCHEMISTRY
330305
Theoretical efficiency of fuel cell is
1 Nearly \(60 \%\)
2 \(50 \%\)
3 \(33 \%\)
4 Nearly \(100 \%\)
Explanation:
Theoretical efficiency of fuel cell is \(100 \%\) but practically it is nearly \(60-70 \%\).
The reactions occurring in \({{\rm{H}}_{\rm{2}}}{\rm{ - }}{{\rm{O}}_{\rm{2}}}\) fuel cell are At anode : \({\rm{2}}{{\rm{H}}_{{\rm{2(g)}}}}{\rm{ + 4OH}}_{{\rm{(aq}}{\rm{.)}}}^{\rm{ - }} \to {\rm{4}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{{\rm{(1)}}}}{\rm{ + 4}}{{\rm{e}}^{\rm{ - }}}\) \(\frac{{{\rm{At}}\,\,{\rm{cathode}}:\,\,\,{{\rm{O}}_{{\rm{2}}({\rm{g}})}}{\rm{ + 2}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{({\rm{1}})}}{\rm{ + 4}}{{\rm{e}}^{\rm{ - }}} \to {\rm{4OH}}_{({\rm{aq}})}^{\rm{ - }}}}{{{\rm{Overall}}\,\,{\rm{reaction}}:\,\,\,{\rm{2}}{{\rm{H}}_{{\rm{2}}({\rm{g}})}}{\rm{ + }}{{\rm{O}}_{{\rm{2}}({\rm{g}})}} \to {\rm{2}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{({\rm{1}})}}}}\)
KCET - 2015
CHXII03:ELECTROCHEMISTRY
330304
Which of the following acts as oxidising agent in hydrogen-oxygen fuel cell?
1 \({{\rm{H}}_{\rm{2}}}\)
2 \({{\rm{O}}_{\rm{2}}}\)
3 \({\rm{KOH}}\)
4 \({\rm{C}}\)
Explanation:
Hydrogen-oxygen fuel cell is an electrochemical cell that converts the chemical energy of hydrogen which is a fuel and oxygen which act as an oxidising agent into electricity through a pair of redox reaction.
CHXII03:ELECTROCHEMISTRY
330305
Theoretical efficiency of fuel cell is
1 Nearly \(60 \%\)
2 \(50 \%\)
3 \(33 \%\)
4 Nearly \(100 \%\)
Explanation:
Theoretical efficiency of fuel cell is \(100 \%\) but practically it is nearly \(60-70 \%\).
The reactions occurring in \({{\rm{H}}_{\rm{2}}}{\rm{ - }}{{\rm{O}}_{\rm{2}}}\) fuel cell are At anode : \({\rm{2}}{{\rm{H}}_{{\rm{2(g)}}}}{\rm{ + 4OH}}_{{\rm{(aq}}{\rm{.)}}}^{\rm{ - }} \to {\rm{4}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{{\rm{(1)}}}}{\rm{ + 4}}{{\rm{e}}^{\rm{ - }}}\) \(\frac{{{\rm{At}}\,\,{\rm{cathode}}:\,\,\,{{\rm{O}}_{{\rm{2}}({\rm{g}})}}{\rm{ + 2}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{({\rm{1}})}}{\rm{ + 4}}{{\rm{e}}^{\rm{ - }}} \to {\rm{4OH}}_{({\rm{aq}})}^{\rm{ - }}}}{{{\rm{Overall}}\,\,{\rm{reaction}}:\,\,\,{\rm{2}}{{\rm{H}}_{{\rm{2}}({\rm{g}})}}{\rm{ + }}{{\rm{O}}_{{\rm{2}}({\rm{g}})}} \to {\rm{2}}{{\rm{H}}_{\rm{2}}}{{\rm{O}}_{({\rm{1}})}}}}\)
KCET - 2015
CHXII03:ELECTROCHEMISTRY
330304
Which of the following acts as oxidising agent in hydrogen-oxygen fuel cell?
1 \({{\rm{H}}_{\rm{2}}}\)
2 \({{\rm{O}}_{\rm{2}}}\)
3 \({\rm{KOH}}\)
4 \({\rm{C}}\)
Explanation:
Hydrogen-oxygen fuel cell is an electrochemical cell that converts the chemical energy of hydrogen which is a fuel and oxygen which act as an oxidising agent into electricity through a pair of redox reaction.
CHXII03:ELECTROCHEMISTRY
330305
Theoretical efficiency of fuel cell is
1 Nearly \(60 \%\)
2 \(50 \%\)
3 \(33 \%\)
4 Nearly \(100 \%\)
Explanation:
Theoretical efficiency of fuel cell is \(100 \%\) but practically it is nearly \(60-70 \%\).
