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Question

The number of oxygen atoms used in the combustion of 1 molecule of ethanol is:

A
3
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B
1
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C
32
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D
6
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Solution

The correct option is D 6
Balanced equation for combustion of ethanol can be written as:
C2H5OH+3O22CO2+3H2O
Since for combustion of 1 molecule of ethanol, 3 molecules of oxygen are required. Hence 6 atoms of oxygen are comsumed.

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