Properties of Hydrogen

Hydrogen is a colorless, odorless gas, the lightest and most abundant element in the universe. It has various applications, from filling airships to being a key component in the chemical industry. On Earth, hydrogen is found in water and fossil fuels. It plays a crucial role in the pH scale and chemical reactions. Hydrogen is essential for life but remains mostly inactive, bonded to other elements. As a fuel, it produces only water, making it a potential clean energy source. Hydrogen has three isotopes, used in nuclear fusion research for clean energy. Overall, hydrogen is vital for life and a promising future fuel.

What was one of the first practical uses of hydrogen due to its low density?

• Refrigerant

• Fuel for cars

• Filling airships

• Cooking gas

In the chemical industry, hydrogen is crucial for producing which agricultural product?

• Pesticides

• Ammonia for fertilizers

• Herbicides

• Insecticides

What does the 'H' in the pH scale represent?

• Humidity

• Heat

• Hydrogen ions

• Helium

Which of the following is a potential benefit of using hydrogen as a fuel?

• Increases air pollution

• Produces carbon dioxide

• Generates only water when burned

• Requires fossil fuels

Which isotope of hydrogen is artificially made and radioactive?

• Helium

• Protium

• Tritium

• Deuterium