Which one of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles, powered by hydrogen ?
[amp_mcq option1=”Hydrogen peroxide” option2=”Hydronium” option3=”Oxygen” option4=”Water vapour” correct=”option4″]
This question was previously asked in
UPSC IAS – 2024
Fuel Cell Electric Vehicles (FCEVs) powered by hydrogen generate electricity through an electrochemical process where hydrogen reacts with oxygen from the air. The primary chemical reaction in a hydrogen fuel cell is 2H₂ + O₂ → 2H₂O. This reaction produces water (H₂O) and energy (electricity and heat). The water produced is expelled from the vehicle, typically as water vapour, which is essentially steam.
The fundamental output of a hydrogen fuel cell, besides electricity and heat, is water.