Which one of the following pollutants is produced while burning hydrogen as fuel?

Correct option is B

When hydrogen is used as a fuel and undergoes combustion (burning), it reacts with oxygen to form water vapor (H₂O). The chemical equation for this process is:
2H2+O2→2H2O
· No carbon emissions are produced during the combustion of hydrogen since hydrogen does not contain carbon.
· The only byproduct of burning hydrogen fuel is water vapor (H₂O), making it a clean and environmentally friendly fuel.
Information Booster:
1. Hydrogen as a Clean Fuel:
· Hydrogen fuel produces zero carbon dioxide emissions during combustion.
· It is considered an ideal alternative to fossil fuels for reducing greenhouse gases.
2. Hydrogen Combustion:
· The primary reaction of hydrogen combustion releases water vapor and energy.
· This makes it suitable for applications in transportation, power generation, and heating.
3. Water Vapor:
· The only emission from hydrogen combustion is water vapor, which is non-toxic.
· Water vapor does not contribute to air pollution or greenhouse gases in the same manner as CO₂.
4. Applications of Hydrogen Fuel:
· Hydrogen fuel cells for electric vehicles (FCEVs).
· Power plants and industrial processes for clean energy.
Additional Knowledge:
1. (a) CO₂:
· Carbon dioxide is produced when carbon-based fuels (like petrol, diesel, coal, or natural gas) are burned.
· Hydrogen combustion does not produce CO₂.
2. (b) H₂O:
· Water vapor is the only byproduct when burning pure hydrogen.
· This makes hydrogen an attractive option for sustainable energy.
3. (c) SOₓ (Sulfur Oxides):
· Produced when fuels containing sulfur, like coal or diesel, are burned.
· Hydrogen fuel does not contain sulfur, hence no SOₓ emissions.
4. (d) NO₂ (Nitrogen Dioxide):
· Produced during combustion processes at high temperatures, especially with nitrogen present in the air.
· Though hydrogen combustion can produce small amounts of NO₂, it is not a primary pollutant of hydrogen fuel combustion.
Key Points:
1. Clean Energy: Hydrogen fuel produces only water vapor.
2. Zero CO₂: No greenhouse gas emissions.
3. Applications: Widely used in fuel cells and combustion engines.
4. Air Quality: Hydrogen fuel helps improve air quality by reducing pollutants.