Correct option is B
The correct answer is (b) Chlorine.
- Chlorine is a greenish-yellow gas at room temperature.
- It has a characteristic pungent smell that is easily recognizable.
- Chlorine is commonly used in water purification and disinfectants.
- It is a highly reactive element and can form compounds with most other elements.
Information Booster:
- Iodine is a solid at room temperature and appears as dark violet or black crystals, not a greenish-yellow gas.
- Carbon monoxide is a colorless, odorless gas.
- Hydrogen sulphide is a colorless gas with a characteristic smell of rotten eggs, not greenish-yellow.
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