One litre of `O_(2)` and one litre of `h_(2)` are taken in a vessel of 2 litre capacity at `NTP` The gases are made to combine to form water .
The mole of `O_(2)` used of formation of water is .

Options

A. `5.23 xx 10^(-2)`
B. `4.23 xx 10^(-2)`
C. `3.23 xx 10^(-2)`
D. `2.23 xx 10^(-2)`

Explanation

Volume of `O_(2)` used for formation of `H_(2)O=0.5` litre
`:.` Moles of `O_(2)` used for foramation of `H_(2)O` at `NTP`
` = (0.5)/(22.4) =2.23 xx 10^(-2)` .