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Question

A fuel cell uses oxygen and gas as fuel.

A
hydrogen
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B
nitrogen
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C
chlorine
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Solution

The correct option is A hydrogen
A fuel cell is a device that converts chemical energy (energy released during chemical reactions) into electrical energy.

In a fuel cell, hydrogen gas reacts with oxygen to produce huge amount of energy and water is formed as a byproduct. The reaction involved is:

2H2(g)+O2(aq)H2O(l)+Energy

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