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What is the following is the main constituent gas in the core of the Sun?
1. Helium
2. Oxygen
3. Hydrogen
4. Methane

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Correct Answer - Option 3 : Hydrogen

The correct answer is Hydrogen.

  • The main constituent of the Sun is Hydrogen.
    • Hydrogen is the chemical element with the symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table.
    • Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass.
    • Non-remnant stars are mainly composed of hydrogen in the plasma state.
    • The most common isotope of hydrogen, termed protium (name rarely used, symbol 1H), has one proton and no neutrons.
    • The Sun is the star at the center of the Solar System.
    • It is a nearly perfect sphere of hot plasma,[18][19] heated to incandescence by nuclear fusion reactions in its core, radiating the energy mainly as visible light and infrared radiation.
    • It is by far the most important source of energy for life on Earth.
    • The Sun is a G-type main-sequence star (G2V) based on its spectral class.
    • In its core the Sun currently fuses about 600 million tons of hydrogen into helium every second, converting 4 million tons of matter into energy every second as a result.
    • This energy, which can take between 10,000 and 170,000 years to escape the core, is the source of the Sun's light and heat.

  • Helium is sourced from natural gas fields that have high concentrations of helium in the natural gas, using cryogenic gas separation techniques, and radon is usually isolated from the radioactive decay of dissolved radium, thorium, or uranium compounds.
  • Methane is a one-carbon compound in which the carbon is attached by single bonds to four hydrogen atoms.
    • It is a colourless, odourless, non-toxic but flammable gas (b.p. -161℃). It has a role as a fossil fuel, a member of greenhouse gas and a bacterial metabolite.
  • Oxygen is the chemical element with the symbol O and atomic number 8.
    • It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.
    • After hydrogen and helium, oxygen is the third-most abundant element in the universe by mass.

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