Densities of two gases are in the ratio `1: 2` and their temperatures are in the ratio `2:1`, then the ratio of their respective pressure is

Options

A. `1:1`
B. `1:2`
C. `2:1`
D. `4:1`

Answer

A

Explanation

`(d_(1))/(d_(2))=(1)/(2), T_(1)/(T_(2))=(2)/(1)`
`:. (P_(1))/(P_(2))=(V_(2))/(V_(1))xx(T_(1))/(T_(2))=(T_(1)d_(1))/(T_(2).d_(2))`
`(P_(1))/(P_(2))=(2)/(1).(1)/(2)=(1)/(1)`