A hydrogen fuel cell on the lab bench produces electricity by:
ABurning H$_2$ in air, then converting heat to electricity
BReacting H$_2$ with O$_2$ to give water with electron flow
CCompressing H$_2$ and releasing it through a magnet coil
DSplitting water into H$_2$ and O$_2$ on the catalyst surface
Answer & Solution
Correct answer: B. Reacting H$_2$ with O$_2$ to give water with electron flow
Fuel cell: H$_2$ + O$_2$ $\to$ H$_2$O with electron flow through external circuit.
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