Gaseous mixture of contains 56 g of `N_(2)` , 44g of `CO_(2)` and 16 g of `CH_(4)` . The total pressure of mixture is 720 mm of Hg . The partial pressure of `CH_(4)` is :-

Options

A. 180 mm
B. 360 mm
C. 540 mm
D. 720 mm

Answer

A

Explanation

`P^(CH_(4))=((16)/(16))/((5)/(28)+(44)/(44)+(16)/(16))xx720`
`=(1)/(2+1+1)xx720`
`=(1)/(4)xx720=180`mm