15 cc of gaseous hydrocarbon required 45 cc of oxygen for complete combustion and 30 cc of CO2 was formed. The formula of the gaseous compound is:
A
C3H16
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B
C2H2
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C
C4H10
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D
C2H4
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Solution
The correct option is DC2H4 The reaction can be shown as: CxHy+(x+y4)O2→xCO2+y2H2O
Since the ratio of the volumes of oxygen and hydrocarbon used in the combustion is 3, and the ratio of carbon dioxide produced and hydrocarbon used is 2,