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Which oxide is basic in nature?
Acarbon dioxide
Bsulphur dioxide
Cnitrogen dioxide
Dsodium oxide
Answer & Solution
Correct answer: D. sodium oxide
1. Metal oxides are generally basic; non-metal oxides are acidic.
2. **Sodium oxide (Na₂O)** is a metal oxide and is basic (dissolves to give NaOH).
3. CO₂, SO₂ and NO₂ are non-metal oxides and are acidic.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch2 'Acids, Bases and Salts', §2.2_
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