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 ?

  • Option 1)

    16 : 1

  • Option 2)

    2 : 1

  • Option 3)

    1 : 4

  • Option 4)

    4 : 1

 

Answers (1)

 

Partial Pressure of a gas in gaseous mixture -

Partial Pressure = (Total Pressure of Mixture) \times (mole fraction of gas)

 

-

 

 suppose mass of H_{2}    = x

then, mass of  O_{2} = 4x

Moles of  H_{2}=\frac{x}{2}

Moles of O_{2}=\frac{4x}{32}=\frac{x}{8}

 molar\ ratio =\frac{\frac{x}{2}}{\frac{x}{8}} = 4:1

 


Option 1)

16 : 1

This option is incorrect.

Option 2)

2 : 1

This option is incorrect.

Option 3)

1 : 4

This option is incorrect.

Option 4)

4 : 1

This option is correct.

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