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Question
Which one of the following will not produce an acid when made to react with water.
Options
Carbon monoxide
Carbon dioxide
Zinc oxide
Copper (II) oxide
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Solution
Carbon monoxide
Explanation:
Carbon monoxide (CO) is classified as a neutral oxide, meaning it shows neither acidic nor basic properties and does not react with water to form an acid. In contrast, carbon dioxide (CO2) is an acidic oxide of a non-metal that readily reacts with water to form weak carbonic acid (H2CO3). While metallic oxides like zinc oxide and copper oxide are generally insoluble in water and do not dissolve to form acids, carbon monoxide is the definitive choice as a neutral gaseous non-metal oxide that chemically fails to form an acid under any standard conditions.
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