An element undergoes partial combustion with oxygen to form a compound which has no effect on litmus. Identify the element.
A
Iron
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B
Carbon
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C
Magnesium
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D
Aluminium
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Solution
The correct option is B Carbon Metals combine with oxygen to form basic oxides. Non-metals combine with oxygen to form acidic oxides. Among the given options, only carbon is a non-metal. It undergoes partial combustion on reaction with oxygen and gives carbon monoxide which is a neutral oxide and has no effect on litmus. The reaction involved is as follows: