For which of the following reactions, the degree of dissociation cannot be calculated from the vapour density data. I. 2HI_((g))hArrH_(2(g))+I_(2(g)) II. 2NH_(3(g))hArrN_(2(g))+3H_(2(g)) III. 2NO_((g))hArrN_(2(g))+O_(2(g)) IV. PCl_(5(g))hArr PCl_(3(g))+Cl_(2(g))

For which of the following reactions, the degree of dissociation canno

1.	For which of the following reactions, the degree of dissociation cannot be calculated from the vapour density data. I. 2HI_((g))hArrH_(2(g))+I_(2(g)) II. 2NH_(3(g))hArrN_(2(g))+3H_(2(g)) III. 2NO_((g))hArrN_(2(g))+O_(2(g)) IV. PCl_(5(g))hArr PCl_(3(g))+Cl_(2(g))
Answer» I and III III and IV I and II II and III Answer :A