QOTD April 28,2026

With reference to green hydrogen, consider the following statements:

1. Green hydrogen is produced using renewable energy sources.
2. It involves electrolysis of water to produce hydrogen.
3. It emits carbon dioxide during production.

Which of the statements given above is/are correct?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 only
(d) 1, 2 and 3

Answer: (a) 1 and 2 only

Explanation:

Statement 1 is correct
Green hydrogen is produced using renewable sources like solar or wind energy.

Statement 2 is correct
Electrolysis splits water into hydrogen and oxygen using electricity.

Statement 3 is incorrect
Green hydrogen production does not emit carbon dioxide if renewable energy is used.

Why in news–

India’s first port-based green hydrogen pilot project has been launched at V.O. Chidambaranar Port as part of efforts to promote clean energy and reduce carbon emissions in the maritime sector. The initiative aligns with the National Green Hydrogen Mission and aims to demonstrate the use of green hydrogen in port operations, paving the way for decarbonization of shipping and logistics.

News-https://www.thehindu.com/news/cities/Madurai/voc-port-becomes-the-first-indian-port-to-produce-green-hydrogen-and-surpass-1-mw-solar-power/article69883235.ece

There are more questions from this topic that you should practice to make your concepts stronger.

Practice Questions (PQ)

PQ1.Consider the following statements:

1. Electrolysis is the process of splitting water into hydrogen and oxygen using electricity.
2. Grey hydrogen is produced using fossil fuels.
3. Blue hydrogen is produced without any carbon emissions.

Which of the statements given above is/are correct?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 only
(d) 1, 2 and 3

Answer : (a) 1 and 2 only

Explanation:

Statement 1 is correct
Electrolysis uses electrical energy to break water into hydrogen and oxygen.

Statement 2 is correct
Grey hydrogen is derived from natural gas or coal, emitting carbon dioxide.

Statement 3 is incorrect
Blue hydrogen involves carbon capture but may still have emissions.

PQ2. Consider the following statements:

1. Green hydrogen can be used as a clean fuel in transportation and industry.
2. It helps in reducing dependence on fossil fuels.
3. Hydrogen has higher energy content per unit mass compared to fossil fuels.

Which of the statements given above is/are correct?
(a) 1, 2 and 3
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1 only

 Answer: (a) 1, 2 and 3

Explanation:

Statement 1 is correct
Green hydrogen can be used in fuel cells and industrial processes.

Statement 2 is correct
It provides an alternative to fossil fuels.

Statement 3 is correct
Hydrogen has high energy density by mass.

PQ3.Consider the following statements:

1. Ports can act as hubs for hydrogen production and export.
2. Green hydrogen contributes to achieving net-zero targets.
3. Hydrogen fuel produces only water as a by-product when used in fuel cells.

Which of the statements given above is/are correct?
(a) 1, 2 and 3
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1 only

Answer: (a) 1, 2 and 3

 Explanation:

Statement 1 is correct
Ports provide infrastructure for storage and transport of hydrogen.

Statement 2 is correct
It supports decarbonization goals.

Statement 3 is correct
Fuel cells using hydrogen emit water as the main by-product.

 Previous Year Question (UPSC Prelims)

With reference to hydrogen as a fuel, consider the following statements:

1. Hydrogen can be used in fuel cells to generate electricity.
2. The combustion of hydrogen produces carbon dioxide.
3. Hydrogen is the most abundant element in the universe.

Which of the statements given above is/are correct?
(a) 1 and 3 only
(b) 2 and 3 only
(c) 1 only
(d) 1, 2 and 3

Answer: (a) 1 and 3 only

Explanation:

Statement 1 is correct
Hydrogen is used in fuel cells to produce electricity.

Statement 2 is incorrect
Hydrogen combustion produces water, not carbon dioxide.

Statement 3 is correct
Hydrogen is the most abundant element in the universe.