A mixture of gases contains H 2 and O 2 gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the…

A mixture of gases contains H2 and O2 gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture?
  1. 1 : 4
  2. 4 : 1
  3. 16 : 1
  4. 2 : 1

Solution

\(\begin{array}{|lcccc|}
\hline & & \mathrm{H}_2 & : & \mathrm{O}_2 \\
\hline \mathrm{W} / \mathrm{W} & \Rightarrow & 1 & : & 4 \\
\hline \text {Moles } & \Rightarrow & \frac{1}{2} & : & \frac{4}{32} \\
& \Rightarrow & 1 & : & \frac{1}{4} \\
\hline
\end{array}\)
i.e. 4 : 1

Asked in: NEET 2015 (Phase 1)

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