An oxide which is a base is: (A) MgO (B) PbO ₂ (C) Al(OH) ₃ (D) NH ₄ OH
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A base is a substance that can react with acids and neutralise them. Bases are usually: metal hydroxides, such as sodium hydroxide, or. metal carbonates, such as calcium carbonate.
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Bases v alkalis.
Copper oxide Sodium hydroxide
Is it a base? Yes Yes
Can it dissolve in water? No Yes
Is it an alkali? No Yes
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