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Consider the following statements regarding Hydrogen.
  1. Hydrogen is the lightest and first element on the periodic table.
  2. Because of its highly combustible property, Hydrogen as a fuel can be used only in internal combustion engines and not in spacecraft propulsion.
  3. Molecular hydrogen is not available on Earth in convenient natural reservoirs.
Which of the above statements is/are correct?
  • a)
    1 and 2 only 
  • b)
    1 and 3 only 
  • c)
    2 and 3 only 
  • d)
    1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements regarding Hydrogen. Hydrogen is the ...
Hydrogen fuel:
  • Hydrogen is the lightest and first element on the periodic table. Since the weight of hydrogen is less than air, it rises in the atmosphere and is therefore rarely found in its pure form, H2.
  • At standard temperature and pressure, hydrogen is a nontoxic, nonmetallic, odorless, tasteless, colorless, and highly combustible diatomic gas.
  • Hydrogen fuel is a zero-emission fuel burned with oxygen. It can be used in fuel cells or internal combustion engines. It is also used as a fuel for spacecraft propulsion.
Occurrence of Hydrogen:
  • It is the most abundant element in the universe. The sun and other stars are composed largely of hydrogen.
  • Astronomers estimate that 90% of the atoms in the universe are hydrogen atoms. Hydrogen is a component of more compounds than any other element.
  • Water is the most abundant compound of hydrogen found on earth.
  • Molecular hydrogen is not available on Earth in convenient natural reservoirs. Most hydrogen on Earth is bonded to oxygen in water and to carbon in live or dead and/or fossilized biomass. It can be created by splitting water into hydrogen and oxygen.
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Community Answer
Consider the following statements regarding Hydrogen. Hydrogen is the ...
Statement 1: Hydrogen is the lightest and first element on the periodic table.
This statement is correct. Hydrogen is the lightest element and has an atomic number of 1, making it the first element on the periodic table. It consists of a single proton and a single electron.

Statement 2: Because of its highly combustible property, Hydrogen as a fuel can be used only in internal combustion engines and not in spacecraft propulsion.
This statement is incorrect. While hydrogen is highly combustible and can be used as a fuel in internal combustion engines, it is also widely used in spacecraft propulsion. In fact, hydrogen is often used as a propellant in rocket engines due to its high energy content and the fact that it can be easily stored in liquid form.

Statement 3: Molecular hydrogen is not available on Earth in convenient natural reservoirs.
This statement is correct. Molecular hydrogen (H2) is a gas that is not readily available in convenient natural reservoirs on Earth. It is a highly reactive and lightweight gas, which means that it tends to escape from the Earth's atmosphere over time. However, hydrogen can be produced through various methods such as electrolysis of water or by reforming hydrocarbons.

Therefore, the correct answer is option B - 1 and 3 only.
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Consider the following statements regarding Hydrogen. Hydrogen is the lightest and first element on the periodic table. Because of its highly combustible property, Hydrogen as a fuel can be used only in internal combustion engines and not in spacecraft propulsion. Molecular hydrogen is not available on Earth in convenient natural reservoirs.Which of the above statements is/are correct?a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?
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Consider the following statements regarding Hydrogen. Hydrogen is the lightest and first element on the periodic table. Because of its highly combustible property, Hydrogen as a fuel can be used only in internal combustion engines and not in spacecraft propulsion. Molecular hydrogen is not available on Earth in convenient natural reservoirs.Which of the above statements is/are correct?a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements regarding Hydrogen. Hydrogen is the lightest and first element on the periodic table. Because of its highly combustible property, Hydrogen as a fuel can be used only in internal combustion engines and not in spacecraft propulsion. Molecular hydrogen is not available on Earth in convenient natural reservoirs.Which of the above statements is/are correct?a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements regarding Hydrogen. Hydrogen is the lightest and first element on the periodic table. Because of its highly combustible property, Hydrogen as a fuel can be used only in internal combustion engines and not in spacecraft propulsion. Molecular hydrogen is not available on Earth in convenient natural reservoirs.Which of the above statements is/are correct?a)1 and 2 onlyb)1 and 3 onlyc)2 and 3 onlyd)1, 2 and 3Correct answer is option 'B'. Can you explain this answer?.
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