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Short Tricks: Revision of Hydrogen Video Lecture | Chemistry Class 11 - NEET

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FAQs on Short Tricks: Revision of Hydrogen Video Lecture - Chemistry Class 11 - NEET

1. What is hydrogen?
Ans. Hydrogen is a chemical element with the symbol H and atomic number 1. It is the lightest and most abundant element in the universe, constituting about 75% of its elemental mass.
2. How is hydrogen used as a fuel?
Ans. Hydrogen can be used as a fuel in various applications, including fuel cells and combustion engines. In fuel cells, hydrogen reacts with oxygen to produce electricity and water, with no emissions other than water vapor. In combustion engines, hydrogen can be burned to generate power, but this process produces emissions, including nitrogen oxides.
3. What are the advantages of using hydrogen as a fuel?
Ans. There are several advantages to using hydrogen as a fuel. It is a clean source of energy, as its combustion or use in fuel cells produces no greenhouse gas emissions other than water vapor. It is also highly efficient, as it has a higher energy density per unit of mass compared to gasoline or diesel. Additionally, hydrogen can be produced from a variety of renewable sources, such as solar or wind power, making it a sustainable energy option.
4. How is hydrogen produced?
Ans. Hydrogen can be produced through various methods, including electrolysis of water, steam methane reforming, and coal gasification. Electrolysis involves passing an electric current through water to split it into hydrogen and oxygen. Steam methane reforming involves reacting methane with steam to produce hydrogen and carbon dioxide. Coal gasification involves reacting coal with steam to produce a mixture of hydrogen, carbon monoxide, and carbon dioxide.
5. What are the challenges in using hydrogen as a widespread fuel?
Ans. Although hydrogen has many advantages as a fuel, there are also challenges in its widespread use. One challenge is the storage and transportation of hydrogen, as it has low energy density per unit of volume, requiring either high-pressure tanks or cryogenic storage. Another challenge is the production of hydrogen, as current methods often rely on fossil fuels, which contribute to greenhouse gas emissions. Additionally, there is a need for a robust infrastructure to support the production, distribution, and refueling of hydrogen.
195 videos|337 docs|190 tests
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