1 mole of each of `X_(1),X_(2),X_(3)` with van der Waal's constants a (in atm `L^(3) mol^(-2)`) 1.0, 3.8, 2.1 respectively is kept separately in three different vessels of equal volume at identical temperature. Their pressures are observed to `P_(1),P_(2),` and `P_(3)` respectively. On the basis of this data alone, select the correct option (neglect the effect of 'b') :

Options

A. `P_(1) lt P_(2) lt P_(3)`
B. `P_(2) lt P_(1) lt P_(3)`
C. `P_(2) lt P_(3) lt P_(1)`
D. `P_(1) = P_(2) = P_(3)`

Answer

C

Explanation

`P_("Real") = P_(1) - (n^(2)a)/(V^(2))` , `{:(a uarr P_(r) darr),(P_(2) lt P_(3) lt P_(1)):}`