Two separate bulbs contain ideal gases A and B respectively. The density of gas A is twice that of gas B and the molar mass of gas A is half that of gas. If the two gases are at the same temperature, the ratio of pressure of A to that of B is `:`

Options

A. 1. 4
B. 2. 2
C. 3. `1//4`
D. 4. `1//2`

Answer

A

Explanation

`p = ( dRT)/( M )`
`p_(x) = ( d_(x) RT)/( M_(x))`
`p_(Y) = ( dy RT)/( M_(y))`
`( P_(x))/( P_(y)) = ( d_(x) //d_(y))/( M_(x) //M_(y)) = ( 2)/((1)/(2))= 4`