SSC Selection Post 2025 PYQ — Question 6

Correct Answer

Its combustion produces only water vapour and no greenhouse gases

Explanation

Hydrogen is considered a clean fuel because, when it undergoes combustion (or is used in a fuel cell), the primary byproduct is water vapour ($H_2O$). Unlike fossil fuels such as coal, oil, or natural gas, the burning of hydrogen does not release carbon dioxide ($CO_2$), carbon monoxide ($CO$), or other harmful pollutants like sulfur oxides or nitrogen oxides (in a controlled fuel cell environment).

Key Points

The environmental benefit of hydrogen lies in its ability to provide energy without contributing to global warming or air pollution at the point of use. While hydrogen is an energy carrier rather than a primary energy source, its potential to decarbonize sectors like heavy transportation, manufacturing, and heating is immense. The production method of hydrogen—such as "green hydrogen" produced via electrolysis using renewable energy—further ensures its classification as a sustainable and clean energy solution.

Important Questions and Answers

Question: What is "Green Hydrogen"?

Answer: It is hydrogen produced by splitting water into hydrogen and oxygen through the process of electrolysis using renewable energy sources like wind or solar power, ensuring no carbon emissions are generated during production.

Question: What are the main challenges in using hydrogen as a common fuel?

Answer: The primary challenges include high costs of production and storage, the need for specialized infrastructure for transport, and the energy-intensive nature of its extraction from various sources.