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Q44 (NDA-I/2017) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Applied everyday chemistry Answer Verified

Match List I with List II and select the coirect answer using the code given below the. Lists : List I List II (Noble gas) (Use) A. Argon 1. In lights for advertising display B. Neon 2. Airport landing lights and in C. Kwton lighthouses D. Xenon 3. Light in photographer’s flash gun 4. In tungsten filament to last longer Code : A B C D

Result
Your answer: —  ·  Correct: D
Explanation

The matching of noble gases to their specific applications is based on their unique physical and chemical properties. Argon (A) is commonly used in incandescent light bulbs to fill the space around the tungsten filament; its inert nature prevents the filament from oxidizing, thereby extending its lifespan. Neon (B) is famously used in advertising display lights (neon signs) because it emits a characteristic bright orange-red glow when ionized by an electric current. Krypton (C) is utilized in high-intensity lighting applications, such as airport landing lights and lighthouses, due to its ability to produce bright white light. Xenon (D) is the standard gas for photographer's flash guns and strobe lights because it can produce an intense, daylight-quality burst of light. Therefore, the correct sequence is A-4, B-1, C-2, D-3.

Sources

  1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 20: Earths Atmosphere > Nitrogen > p. 272
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