A 40 mL of a mixture of H_(2) and O_(2) at 18^(@)C and 1 atm pressure was sparked so that the formation of water was complete. The remaining pure gas had a volume of 10mL at 18^(@)C and 1 atm pressure. If the remaining gas was H_(2). The mole fraction of H_(2) in the 40mL mixture is:

A 40 mL of a mixture of H_(2) and O_(2) at 18^(@)C and 1 atm pressure

1.	A 40 mL of a mixture of H_(2) and O_(2) at 18^(@)C and 1 atm pressure was sparked so that the formation of water was complete. The remaining pure gas had a volume of 10mL at 18^(@)C and 1 atm pressure. If the remaining gas was H_(2). The mole fraction of H_(2) in the 40mL mixture is:
Answer» <html><body><p>0.75<br/>0.5<br/>0.65<br/>0.85</p>Answer :a</body></html>