Mole ConceptMedium
Question
A volume of 100 ml of air containing only oxygen and nitrogen is a taken in a jar over water. NO is slowly passed till no more brown fumes appear in the gas jar. It is found that 42 ml of NO is required. The percentage of nitrogen in the air would be
Options
A.42%
B.79%
C.21%
D.39.5%
Solution
2NO + O2 → 2NO2
42 mL 21 mL
Hence, volume per cent of nitrogen = 79%
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