Most volatile hydride of VIA group is

From H2O to H2Po vanderwaal's forces of attractions increases .B.P order must beH2O< H2S < H2Se < H2TeBut due to association of H2O molecules through intermolecular H- bonding it has abnormal B.PActual B.P order is:    H2S < H2Se < H2Te < H2Oorder of Volatality:   H2S > H2Se > H2Te > H2O