Hydrogen mcqs with answers, It is the lightest and most abundant chemical element in the universe, constituting about 75% of all normal matter. 1 day ago · Green hydrogen could be a game-changer for the clean energy transition—but right now, it’s too expensive and still relies on harmful “forever chemicals. ” A new EU-backed project called Hydrogen is a feedstock and energy carrier used in multiple sectors. Jan 16, 2026 · The earliest known chemical property of hydrogen is that it burns with oxygen to form water; indeed, the name hydrogen is derived from Greek words meaning ‘maker of water. Hydrogen energy refers to the use of hydrogen as a clean and versatile energy carrier which is capable of storing, moving and delivering energy produced from diverse sources such as water, fossil fuels or biomass to power vehicles, generate electricity and heat buildings. Global hydrogen demand reached 97 Mt in 2023, a 2. Using fossil fuels or clean electricity, we can produce hydrogen gas, which can be stored, transported, and burned to provide power. S. Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1. ’ Hydrogen occurs naturally on earth in compound form with other elements in liquids, gases, or solids. Hydrogen has been described as the “Swiss army knife” of energy because it plays a key role in several sectors where there are limited or no viable alternatives (including in applications where electrification is particularly challenging or costly). Jul 25, 2025 · Hydrogen is the lightest chemical element and the most abundant chemical substance in the universe. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Hydrogen is a chemical element; it has the symbol H and atomic number 1. . 1,2 Hydrogen is the most abundant element in the universe, but is present in limited amounts in elemental form on Earth. 1 day ago · Today, hydrogen is used mainly in oil refining, production of ammonia for fertilizer and to make methanol, which can be a fuel and an ingredient in plastics. Hydrogen combined with oxygen is water (H 2 O). Hydrogen combined with carbon forms different compounds—or hydrocarbons—that are found in natural gas, coal, and petroleum. 008. 5% increase from 2022, with 10 Mt in the U. Hydrogen is a chemical element; it has the symbol H and atomic number 1.


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