Question

Consider the given figure,

Two volumes of hydrogen react with one volume of oxygen to give two volumes of water vapour.
$\underset{100\,mL}{\text { Hydrogen }}+\underset{A}{\text { Oxygen }} \longrightarrow \underset{100\,mL}{\text { Water }}$
The volumes of hydrogen and oxygen which combine together bear a simple ratio of $\ldots B . \ldots$.
The missing terms $A$ and $B$ respectively are

• A. $A \rightarrow 25\, mL , B \rightarrow 1: 2$
• B. $A \rightarrow 50\, mL , B \rightarrow 1: 2$
• C. $A \rightarrow 50\, mL , B \rightarrow 2: 1$
• D. $A \rightarrow 25\, mL , B \rightarrow 2: 1$

Answer 1

Answer: (C)

$100\, mL$ of hydrogen combines with $50\, mL$ of oxygen to give $100\, mL$ of water vapour.
Thus, the volumes of hydrogen and oxygen which combine together (i.e. $100\, mL$ and $50\, mL$ ) bear a simple ratio of $2: 1$.