If $30 \mathrm{~mL}$ of $\mathrm{H}_2$ and $20 \mathrm{~mL}$ of $\mathrm{O}_2$ react to form water, what is left at the end of the reaction?

$5 \mathrm{~mL}$ of $\mathrm{O}_2$

$10 \mathrm{~mL}$ of $\mathrm{H}_2$

$5 \mathrm{~mL}$ of $\mathrm{H}_2$

$10 \mathrm{~mL}$ of $\mathrm{O}_2$

NEET UG CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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Application +4 | -1

30 \mathrm{~mL}

\mathrm{H}_2

and

20 \mathrm{~mL}

\mathrm{O}_2

react to form water, what is left at the end of the reaction?

View answer and explanation

Correct option: D

5 \mathrm{~mL}

\mathrm{O}_2

Option D (

5 \mathrm{~mL}

\mathrm{O}_2

) is correct because the reaction consumes twice the volume of H2 compared to O2, leaving excess O2.