Most volatile hydride of VIA group is

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H2S

H2O

H2Se

H2Te

answer is A.

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Detailed Solution

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

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