Twenty millilitres of a gaseous hydrocarbon required 400 ml of air for complete combustion. The air contains 20% by volume of oxygen. The volume of gaseousmixture after explosion and cooling was found to be 380 ml.Volume of O_(2) used is

Twenty millilitres of a gaseous hydrocarbon required 400 ml of air for

1.	Twenty millilitres of a gaseous hydrocarbon required 400 ml of air for complete combustion. The air contains 20% by volume of oxygen. The volume of gaseousmixture after explosion and cooling was found to be 380 ml.Volume of O_(2) used is
Answer» 70ml 75ml 80ml 85ml Answer :C