\(50 cm 3\) of hydrogen is sparked with \(20 cm 3\) of oxygen at \(100^{\circ} C\) and atmosphere. The total volume of the residual gases is _____________
A. \(50 cm ^{3}\) B. \(10 cm ^{3}\) C. \(40 cm ^{3}\) D. \(30 cm ^{3}\)
Correct Answer: A
Explanation
\(2 H _{2}+ O _{2} \rightarrow .2 H _{2} O\) Reaction mole 2 moles 1 mole 2 moles Reacting atom \(50 cm 220 cm 3\) - Reaction ratio \(40 cm 20 cm 40 cm\) Residual gas \(10 cm 3-40 cm 3\) Residual gas = unreacted hydrogen \(+\) formed water =10+40=50 cm
