Which group 17 element gets its name for being a yellow-green dense gas with a choking smell?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. Chlorine.
- Chlorine is a Group 17 element (Halogen) in the periodic table and is known for the following characteristics:
- It is a yellow-green gas at room temperature.
- It has a dense and toxic nature.
- Emits a choking, pungent smell—used in WWI as a chemical weapon.
- The name “chlorine” comes from the Greek word "chloros", meaning pale green.
- It is used in water purification, disinfectants, and bleach.
Other Options:
Argon
- Group 18 element (Noble Gas).
- Colorless, odorless, and inert gas.
- Does not react easily and has no smell.
- Commonly used in light bulbs and welding.
Helium
- Group 18 element (Noble Gas).
- Colorless, odorless, and non-toxic.
- Very light—used in balloons and cryogenics.
- Has no choking smell and is non-reactive.
Krypton
- Also a Group 18 noble gas.
- Colorless, odorless, and rare in the atmosphere.
- Used in high-performance lighting.
- Not yellow-green and has no smell.