Single Choice

Which of the following reactions is used to make a fuel cell?

A$$2H_2(g)+O_2(g)\rightarrow 2H_2O(l)$$
Correct Answer
B$$2Fe(s)+O_2(g)+4H^+(aq)\rightarrow 2Fe^{2+}(aq)+2H_2O(l)$$
C$$Pb(s)+PbO_2(s)+2H_2SO_4(aq)\rightarrow 2PbSO_4(s)+H_2O(l)$$
D$$Cd(s)+2Ni(OH)_3(s)\rightarrow CdO(s)+2Ni(OH)_2+2H_2O(l)$$

Solution

Galvanic cells that use the energy of combustion of fuel like $$H_2$$, $$CH_4$$, $$CH_3OH$$, etc, as the source to produce electrical energy are called fuel cells.

$$2H_2(g) + O_2(g) \rightarrow 2H_2O(l)$$

SIMILAR QUESTIONS

Electrochemistry

In fuel cells, the reaction that takes place at the anode is:

Electrochemistry

The efficiency of fuel cell is given by the expression, $$\eta $$ is:

Electrochemistry

A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as:

Electrochemistry

Write the name of the electrolyte used in fuel cell.

Electrochemistry

Define the following terms : Fuel cell

Electrochemistry

For the given cells : Lead storage cell , Mercury cell , Fuel cell and Dry cell Answer the following : Which cell was used in Apollo space programme ?

Electrochemistry

Answer the following questions State two advantages of $$ H_2 - O_2 $$ fuel cell over ordinary cell .

Electrochemistry

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

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