The metal that is stored under kerosene to protect it from air is
A{'text': 'Copper', 'label': 'A'}
B{'text': 'Sodium', 'label': 'B'}
C{'text': 'Iron', 'label': 'C'}
D{'text': 'Gold', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': 'Sodium', 'label': 'B'}
1. Sodium is extremely reactive with both oxygen and moisture in air.
2. It reacts vigorously with air, catching fire.
3. NCERT recommends storing sodium under kerosene oil.
4. Kerosene forms a barrier between the metal and atmospheric O₂/H₂O.
_Source: NCERT Class 10 Science, Ch 3 "Metals and Non-metals", §3.2.1_
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