Question
Download Solution PDFWhich of the following options is correctly matched?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Radon – radioactive rare gas.Key Points
- Radon is a colourless, odourless, inert gas but radioactive in nature.
- It comes from the natural decay of uranium or thorium found in nearly all soils.
- Radon breaks down quickly and gives off radioactive particles.
- Long-term exposure to these particles can lead to lung cancer.
- Hence it is correctly matched.
Additional Information
- Argon is a chemical element with the atomic number 18.
- It is a Nobel gas.
- It is in group 18 of the periodic table.
- Argon is the third most abundant gas in the Earth's atmosphere (0.094%)
- Uses: Fluorescent Lightning, Gas Discharge Tubes, Fluorescent Glow Starters.
- Helium is the second lightest atom.
- One nucleus of a Helium atom consists of two protons and two neutrons.
- Helium atoms do not combine into molecules.
- That is why it is called an inert gas, which consists of free atoms.
- Neon belongs to the group of inert gases i.e Group 18.
- Neon was discovered by William Ramsay.
- Neon gives a reddish glow when it is used in neon lamps and tubes.
- It is a colorless inert noble gas.
- It is also the second lightest noble gas.
Last updated on Jul 1, 2025
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