10ml of hydrocarbon on complete combustion gives 30ml of CO2and for this 40ml of O2 is required. Then the Molecular Formula of hydrocarbon is ____?

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C3H4

C4H8

C2H6

C3H6

answer is A.

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Detailed Solution

CxHy+(x+y/4)O2→xCO2+y/2H2O(l) 1V (x+y/4)V xV 0Now, V = 10 ml10x = 30 x = 3(x+y/4)×10=40⇒3+y/4=4∴ y=4Molecular Formula C3H4

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