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Question
Generally metallic oxides are basic and non-metallic oxides are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red?
Options
Sulphur dioxide
Iron oxide
Magnesium oxide
Copper oxide
Solution
Sulphur dioxide
Explanation -
Sulphur is a non-metal and it forms an acidic oxide, i.e. sulphur dioxide (S02) which turns blue litmus red.
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