# (solved)Question 1.26 of NCERT Class XI Chemistry Chapter 1

If 10 volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour would be produced?
(Rev. 03-Aug-2022)

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### Question 1.26 NCERT Class XI Chemistry

If 10 volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour would be produced?

### Video Explanation(detailed solution given after this video)

Please watch this youtube video for a quick explanation of the solution:

### Solution in Detail

balanced chemical equation with Gay Lussac's law of Gaseous Volumes:

$\displaystyle \underset{2\text{ vols}}{2\text{H}_2 \text{ (g)}} + \underset{1 \text{ vol}}{\text{O}_2\text{ (g)}} \rightarrow \underset{2\text{ vols}}{2\text{H}_2\text{O (g)}}$

Assumption: same pressures and temperatures of O2, H2 and H2O

Volumes of H2 = 10 vols given

So adjust the equation by using 5 as the mulitplier

10 vols H2 + 5 vols O2 → 10 vol H20

vol of O2 given 5 vols, so there is no limiting reagant.

So volume of vapor = 10 vols Answer!