Questions and Answers | Latest Version
| 2024/2025 | Correct & Verified
Which gas is used in fire extinguishers to smother flames?
✔✔ Carbon dioxide
Which element is used in making stainless steel?
✔✔ Chromium
Which element has the highest density?
✔✔ Osmium
Which element is used in making coins and jewelry?
✔✔ Silver
What is the most abundant gas in Earth's atmosphere?
✔✔ Nitrogen
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, Which element is used to disinfect water in swimming pools?
✔✔ Chlorine
Which element is responsible for the red color in blood?
✔✔ Iron
Which element is necessary for plant photosynthesis?
✔✔ Magnesium
Which element is the main component of sand?
✔✔ Silicon
Which metal is known for its resistance to rust?
✔✔ Gold
Which gas is produced by plants during photosynthesis?
✔✔ Oxygen
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