alleryThe metal that is stored under kerosene to protect it from air is
ACopper
BSodium
CIron
DGold
Answer & Solution
Correct answer: B. Sodium
1. Sodium is extremely reactive with both oxygen and moisture in air.
2. It reacts vigorously with air, catching fire.
3. Your syllabus recommends storing sodium under kerosene oil.
4. Kerosene forms a barrier between the metal and atmospheric O₂/H₂O.
_Source: syllabus Science, Ch 3 "Metals and Non-metals", §3.2.1_
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