______ reacts with the oxygen to form oxides that turns blue litmus _____.
A
Sodium, green
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B
Magnesium,red
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C
Iron, black
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D
Carbon, red
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Solution
The correct option is D Carbon, red Non-metals combine with oxygen to form non-metallic oxides. Non-metallic oxides are acidic in nature. They turn blue litmus red. Carbon on reacting with oxygen forms carbon dioxide which is acidic in nature.