Question

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 two gases in the mixture ?

• A. 2 : 1
• B. 1 : 4
• C. 4 : 1
• D. 16 : 1

Answer 1

The correct option is C

4 : 1

$\frac{W_{H_2}}{W_{O_2}}=\frac{1}{4};\frac{n_{H_2}}{n_{O_2}}=\frac{W_{H_2}}{M_{H_2}}\times \frac{M_{O_2}}{W_{O_2}}=\frac{1}{2}\times \frac{32}{4}=4$