A
Hydrogen peroxide
B
Hydronium
C
Oxygen
D
Water vapour
Correct answer: (d) Water vapour
Explanation
- A
Hydrogen peroxide
Hydrogen peroxide. Not the FCEV tailpipe product.
- B
Hydronium
Hydronium. Aqueous H3O+, not the exhaust gas.
- C
Oxygen
Oxygen. The cell consumes oxygen from air, it does not exhaust it as the product.
- D
Water vapour
Water vapour. H2 + O2 in a fuel cell → electricity + H2O.
Summary. Official key is (d) water vapour. A hydrogen fuel-cell electric vehicle combines hydrogen with oxygen; the exhaust is water (vapour). Not peroxide, hydronium or oxygen.
Same topic · past papers
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These previous-year questions sit on the same topic. Open one to practise the earlier ask.
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2021 · Q25 · General Studies · 2 marks
Magnetite particles, suspected to cause neurodegenerative problems, are generated as environmental pollutants from which of the following? 1. Brakes of motor vehicles 2. Engines of motor vehicles 3. Microwave stoves within homes 4. Power plants 5. Telephone lines Select the correct answer using the code given below