Geo-Scientist Prelims 2026 Chemistry Q47: A steel vessel contains a mixture of H₂ and O₂ in a 2 : 1 molar…

A steel vessel contains a mixture of H₂ and O₂ in a 2 : 1 molar ratio at a constant temperature T and pressure p. If the volume of H₂ gas collected in 10 min is 15 mL at the same T and p, what will be the volume of O₂ gas collected in 20 min at the same T and p ?

1. (a) 3·8 mL
2. (b) 1·9 mL
3. (c) 3·2 mL
4. (d) 5·6 mL