A mixture of gases contains and gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture? [2015]

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Solution

Q.
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 [2015]

1 16 : 1

2 2 : 1

3 1 : 4

4 4 : 1

Ans.
(4)

Number of moles of $H_{2} = \frac{1}{2}$

Number of moles of $O_{2} = \frac{4}{32}$

Hence, molar ratio $= \frac{1}{2} : \frac{4}{32} = 4 : 1$

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