Hydrogen fuel cell vehicles produce one of the following as “exhaust”:
✓ Correct answer: c) H2O
ExplanationHydrogen fuel cell vehicles produce water (H2O) as the only byproduct or “exhaust” when hydrogen reacts with oxygen in the fuel cell to produce electricity.The reaction is: 2H2 + O2 → 2H2O This clean process makes hydrogen fuel cell vehicles environmentally friendly, emitting only water vapor.298
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