Which inert gas is used in double-glazed windows to fill the space between the panes?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. Argon.
- Argon gas, an inert gas, is used to fill the space between the panes in double-glazed windows.
- Double-glazed windows consist of two panes of glass with an air space between them that is filled with a noble gas, usually argon or krypton.
- Argon is a colorless, odorless, and non-toxic gas.
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Argon (Ar), with atomic number 18, is a noble gas in Group 18 of the periodic table.
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It is the third most abundant gas in Earth’s atmosphere, making up about 0.094% by volume.
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Because of its chemical inertness, argon is widely used in applications such as fluorescent lighting, gas discharge tubes, and fluorescent glow starters, where it helps stabilize and sustain electrical discharges without reacting with other materials.