Answer: Electrolysis of water using renewable electricity (green hydrogen).
- A Electrolysis of water using renewable electricity (green hydrogen)
- B Direct combustion of fossil fuels to liberate hydrogen gas
- C Nuclear fission reactions that release hydrogen as a byproduct
- D Microbial fermentation of organic waste material
Correct answer: A. Electrolysis of water using renewable electricity (green hydrogen)
Explanation: Green hydrogen is produced by electrolysis of water powered by renewable energy (solar/wind), with zero carbon emissions.
Each water molecule's O-H bonds (covalent, solid) can hydrogen-bond (dashed) to neighbouring molecules, forming an extended network responsible for water's unusually high boiling point and density anomaly.
Concept context
The simplest and most abundant element in the universe. Study its unique position in the periodic table, isotopes (protium, deuterium, tritium), properties of water and hydrogen peroxide, and industrial uses.