(B) In a hydrogen-oxygen fuel cell,the following reactions take place to create a potential difference between the two electrodes:Anode: $2H_{2(g)} +

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Create potential difference between the two electrodes

(B) In a hydrogen-oxygen fuel cell,the following reactions take place to create a potential difference between the two electrodes:Anode: $2H_{2(g)} + 4OH^{-}_{(aq)} \to 4H_2O_{(l)} + 4e^{-}$Cathode: $O_{2(g)} + 2H_2O_{(l)} + 4e^{-} \to 4OH^{-}_{(aq)}$Overall reaction: $2H_{2(g)} + O_{2(g)} \to 2H_2O_{(l)}$The net reaction is equivalent to the combustion of hydrogen to form water,which facilitates the flow of electrons and creates a potential difference.

Class 12 Chemistry Electrochemistry Electrochemical cells

Medium

In a hydrogen-oxygen fuel cell,the combustion of hydrogen occurs to:

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A
Produce high purity water
B
Create potential difference between the two electrodes
C
Generate heat
D
Remove adsorbed oxygen from electrode surfaces

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Class 12

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Electrochemistry

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Electrochemical cells

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Define inert electrode and give an example. Also,define an active electrode and give examples.

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$A$ galvanic cell has an electrical potential of $1.1 \ V$. If an opposing potential of $1.1 \ V$ is applied to this cell,what will happen to the cell reaction and the current flowing through the cell?

Medium

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Why is a finely divided particle layer of $Pt$ and $Pd$ provided on the electrodes of a fuel cell?

Easy

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Match List-$I$ with List-$II$.

$LIST$-$I$ (Cell) $LIST$-$II$ (Use/Property/Reaction)

$A$. Leclanche cell $I$. Converts energy of combustion into electrical energy

$B$. Ni-Cd cell $II$. Does not involve any ion in solution and is used in hearing aids

$C$. Fuel cell $III$. Rechargeable

$D$. Mercury cell $IV$. Reaction at anode $Zn \rightarrow Zn^{2+} + 2e^-$

Choose the correct answer from the options given below:

MediumJEE MAIN 2024

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The limiting molar conductivity $\Lambda^o$ for $NaCl$,$KBr$ and $KCl$ are $126$,$152$ and $150 \ S \ cm^2 \ mol^{-1}$ respectively. The $\Lambda^o$ for $NaBr$ is (in $S \ cm^2 \ mol^{-1}$).

Medium

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$LIST$-$I$ (Cell)	$LIST$-$II$ (Use/Property/Reaction)
$A$. Leclanche cell	$I$. Converts energy of combustion into electrical energy
$B$. Ni-Cd cell	$II$. Does not involve any ion in solution and is used in hearing aids
$C$. Fuel cell	$III$. Rechargeable
$D$. Mercury cell	$IV$. Reaction at anode $Zn \rightarrow Zn^{2+} + 2e^-$

In a hydrogen-oxygen fuel cell,the combustion of hydrogen occurs to:

Similar Questions

Define inert electrode and give an example. Also,define an active electrode and give examples.

$A$ galvanic cell has an electrical potential of $1.1 \ V$. If an opposing potential of $1.1 \ V$ is applied to this cell,what will happen to the cell reaction and the current flowing through the cell?

Why is a finely divided particle layer of $Pt$ and $Pd$ provided on the electrodes of a fuel cell?

The limiting molar conductivity $\Lambda^o$ for $NaCl$,$KBr$ and $KCl$ are $126$,$152$ and $150 \ S \ cm^2 \ mol^{-1}$ respectively. The $\Lambda^o$ for $NaBr$ is (in $S \ cm^2 \ mol^{-1}$).

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